راسل و سيمون Lightbourne استدعاء Kaylee لي في القصر، حيث تبين لها عائلتها في محركات العقل أن يشم استردادها. ومع ذلك ، قبل إعطائها لها ، يسأل راسل كايلي مرة أخرى لماذا سرقوا سفينة النقل . يقول كايلي إنه كان من أجل المأوى ، لكن جوزفين لايتبورن ظهرت واستدعت كايلي للكذب. تكشف جوزفين أن عائلة كايلي كانت تهرب من Sanctum . وينفي كايلي الاتهامات ويخطئ جوزفين وكلارك جريفين. ثم تسمي جوزفين كايلي بلقبها القديم "لي لي" ، مما جعل كايلي تدرك أنها صديقة طفولتها حقًا. تكشف جوزي أن كايلي هو من قتلها ، وتعترف كايلي بذلك ، قائلة إنها فعلت ذلك من أجل Sanctum. لتحقيق التعادل ، تأخذ جوزفين سكينًا من على الطاولة وتطعن كايلي ، مما أسفر عن مقتلها.

بعد قتل كايلي ، ذهبت جوزي لتغيير ملابسها. يجدها والداها ترقص أثناء الرسم. يطلب منها راسل التجسس على المجموعة من الأرض من خلال التظاهر بأنها كلارك من أجل معرفة من بينهم الدم الملكي . تقول جوزي إنه سيكون من الأسهل بكثير الحصول على مضيفين إذا أداروا برنامج "التربية" الذي اقترحته. يقول والداها إن الأمر لم يكن أخلاقيًا ، لكنها تتساءل عما إذا كانت كلارك قد وافقت بالفعل على التخلي عن جسدها. يشعر راسل بالقلق من أنه إذا اكتشف أبناء الأرض الحقيقة ، فسوف يحرقون الحرم ، تمامًا كما دمروا الأرض . لذلك ، يوافق جوزي على التظاهر بأنه كلارك. لفشله في إنقاذ روز ، تم تعيين Jade ليكون الحارس الشخصي لـ Josie.

يشك جوردان في أن شيئًا ما حدث لدليلة خلال يوم التسمية لأنها لم تعد تتذكره أو حتى زهرتها المفضلة. ومع ذلك، بيلامي و ميرفي أقول له أنه لشيء يدعو للقلق. انضم إليهم جوزي ، متظاهرًا بأنه كلارك ، الذي صدمهم بالسماح لمادي فجأة بالذهاب إلى المدرسة. يتحدث غايا في Trigedasleng ، ويتساءل غايا عن التغيير المفاجئ في رأي "كلارك" ، لأنه يخاطر بتعريض مادي على أنه دم ليلي. جوزي لا يفهم Trig وبالتالي لا يكتشف أن Madi هي Nightblood. يتفق جوزي أيضًا مع مورفي وبيلامي على أن الأردن يجب أن يتوقف عن القلق بشأن دليلة. الأردن يسأل بليث آنعن التغيير المفاجئ لدليلة ، لكنها فقط أخبرته أن عودة بريا نعمة. عندما طلب بيلامي من جوردان إسقاطها ، قال جوردان إنه لن يتخلى عن دليلة كما تخلى بيلامي عن أوكتافيا .

بعد ذلك ، تذهب جوزفين لتقديم نفسها إلى والدة كلارك ، آبي . وجدت آبي تتجادل مع جاكسون حول هوسها بإنقاذ كين لأنه من المستحيل إجراء عملية جراحية ناجحة قبل وفاة كين. تقول آبي إنها بحاجة إلى إعادة كين لأنه من بين كل هؤلاء ، هو الشخص الوحيد الجيد الذي يستحق أن يعيش. تنضم إليهم جوزي وتبدأ في مساعدة آبي. تطلب "آبي" من "كلارك" تدوين الملاحظات وتفاجأ برؤيتها تستخدم يدها اليمنى لأن كلارك أعسر. يسأل آبي عما إذا كان كلارك على ما يرام. لتجنب تهريب غلافها ، توقفت جوزفين عن تدوين الملاحظات وقدمت اقتراحات مختلفة قبل المغادرة.

يعرض بيلامي لمورفي خريطة Sanctum ويشرح الخطة لجعل Raven يبني درع الإشعاع الخاص به. النية هي أن ينتقل سكان الأرض في النهاية إلى هناك لأنهم لا يستطيعون البقاء في مستوطنة راسل إلى الأبد. بينما لا يزالون يتحدثون ، يُطلب من الجميع التجمع ليقولوا وداعًا لـ Rose وهم يعرضونها على الغابة. بعد ملاحظة أن جوردان مفقود ، وافق بيلامي ومورفي على التخلي عن جنازة روز ومعرفة ما ينوي الأردن فعله. يشتبه بيلامي بشكل صحيح في أن جوردان ذهب للتحقيق في الغرفة التي أصبحت فيها دليلة بريا السابعة. جايا تنضم إليهم. عندما تراهم جوزفين يتجهون إلى الغرفة ، تتبعهم على أمل إيقافهم قبل أن يتعلموا الكثير.

The room is filled with human skeletons. Gaia notices that the skeletons have the Flame infinity symbol and wonders if they were all Commanders. Bellamy figures out that the skeletons belong to the original Eligius III Mission Team Alpha. He notices that some of the skeletons belong to kids, and Josie explains that people will do anything to ensure survival for the ones they love. Josie starts urging them to respect Sanctum traditions and leave, but Jordan continues exploring. He finds a secret door which leads to a lab.

In the lab, they notice much technology related to Becca and the Flame. Bellamy explains that they can't be commanders because Becca didn't invent the Flame until after the first apocalypse. However, she provided her technology to Eligius Corporation before then. Jordan finds a computer and unlocks it using the Eligius III access code. They find a list of video logs. Gaia suggests playing the one titled "Eureka!" It is an experiment log:

A doctor named Gabriel Santiago is forcibly experimenting on a young woman named Brooke, who was grown from an embryo in the incubator. He has spent the last 25 years trying to figure out how to bring Josie back to life. Russell's original form is by Gabriel's side, encouraging him. Gabriel believes he has finally figured out why he was failing before: to successfully upload Josie's consciousness to a new host, they needed to use a fully developed brain and clear the host's consciousness first in order to accommodate the full memory size. He takes out a Mind Drive, which looks a lot like the Flame. He mind wipes Brooke and inserts the Mind Drive inside her neck. A few moments later, Josie wakes up violently inside Brooke's body. Josie notices how much her boyfriend Gabriel has aged. She is afraid of her dad at first, but Gabriel explains that his dad only killed her because of the eclipse-induced psychosis that Josie had figured out. Josie is proud of Gabriel for reverse-engineering the Mind Drive technology to be able to upload an entire mind into a new host. Gabriel ends the experiment video by saying that Josephine was the first success, with more to come.

After watching the video, Bellamy, Jordan and Gaia are horrified by the inhumane experiments they just witnessed. They figure out that the Primes have been manipulating Nightbloods to sacrifice themselves to false gods. Jordan calls it murder, but Josie claims the hosts were willing, even though Brooke was forced into it. Murphy is indifferent, claiming that back on Earth, they used to arm kids to go to war. Realizing that Madi is in danger, Gaia says she will go get her back from school. This helps Josie figure out that Madi has royal blood. She offers to come along.

Later on, Josie tells her parents that Clarke's friends have figured out about the Primes and that Clarke wasn't the only Nightblood. She also mentions that the earthlings call hosts "Nightbloods," which she seems to prefer. She suggests snatching them and turning all the Nightbloods into hosts by force, but Russell wants to be more careful. He asks Josie to go back undercover and find out how many Nightbloods they have in total.

Josie rejoins Clarke's friends, where Madi questions her sudden change of mind. Gaia, Bellamy and Jordan are also surprised that Clarke seems to be willing to tolerate the Primes' actions. Gaia calls the Primes out for abusing Becca's Flame technology, whose intended purpose was to pass wisdom from one person to another. Instead, the Primes want to keep all the wisdom to themselves. Murphy disagrees with her, saying that Becca was just a scientist who was turned into a Nightblood in a lab - the same way Abby did to Clarke. This makes Josie realize that it is possible to turn ordinary people into Nightbloods. Josie gets up quickly to report the exciting news to Jade and her parents.

This makes Bellamy even more suspicious of "Clarke." He follows her and asks to speak to her alone. He notices that "Clarke" is having a hard time understanding Trigedasleng. To test her, he speaks in Trigedasleng explaining how he feels about all the people they've hurt, and how he sees them in his dreams. Unable to understand what Bellamy said, Josie asks him to repeat the last phrase. She then tries to figure it out by saying "flashpa" sounds like "flashback" which could mean "dream." At that point, Bellamy becomes convinced that that is not Clarke. He pins her against the wall and asks her who she is. Josephine knocks him out with a paralytic shot. As Bellamy lies on the ground, immobile, Josie reveals to him that she is Josephine Lightbourne.

With her cover almost blown, Josie decides to change her strategy, by going through Murphy. She gets Murphy drunk and makes it obvious that she's not Clarke by constantly calling him "John" instead of "Murphy" and looking at Josephine's picture. Murphy finally figures it out, but Josie convinces him to work with her by offering him immortality.

Meanwhile, in the woods, Octavia and Diyoza are chasing after Xavier - the remaining known member of the Children of Gabriel. Xavier leads them to a swamp-like ground called "the crucible" where they get stuck and begin to sink. He tells them that the more they fight it, the faster they sink. He offers to save them as long as they tell him who the other Royal Bloods are from Earth. Octavia asks Diyoza to tell them nothing.

While Diyoza remains calm, Octavia actively struggles to go free, which only causes her to sink faster. Diyoza asks Octavia to give up and tell Xavier, but Octavia would rather die. Diyoza asks Octavia if she really wants to die and offers to kill Octavia. She points a gun at Octavia's face but Octavia is not scared at all. She figures out that Octavia wants to die because people in her life hate her. Diyoza advises Octavia to stop caring about whether her friends hate her. Being hated by her friends pales in comparison to Diyoza's situation where her face is placed next to the worst people of all time.

Just as Octavia is about to completely sink, they notice a bright flare in the sky. Xavier says it's a temporal flare and it's very dangerous. He throws them a rope to escape and run to safety. However, Octavia is too submerged to move. To avoid slowing Diyoza down, she asks Diyoza to run and save her baby. Diyoza promises to come back for her. As the flare hits, Octavia closes her eyes and goes underground. Afterwards, Diyoza comes back to check on Octavia. She starts looking around and notices Octavia's body frozen underneath the ground. She breaks the hard surface layer and pulls Octavia out. Luckily, Octavia regains consciousness. Diyoza concludes that Octavia went underground for cover from the flare because she didn't really want to die despite acting like it. Octavia and Diyoza resume their hunt for the Children of Gabriel and their leader.