Spirits are raised and friendships are forged after the nine students successfully complete their first visit to a foreign planet. However, they are reminded that danger still lurks — in outer space, and from within the group.

Ulgar threatens to kill Luca, revealing the previously unknown connection between the two, as well as secrets about Luca himself. Kanata attempts to piece the information together, but another disaster strikes.

The team meet Polina, an astronaut hibernating inside a ship identical to the Astra. Together, they work on a way to get off of this planet.

The entrapment was successful, and the team finally corners the killer amongst them. What drove the killer to do what they did, despite developing such a close bond with the rest of the team?