Our Heroes receive their gifts from Galliton before he gives them devastating news. Afterwards, on the surface, they struggle to cope with the changes that have taken place in their time away. Can our Heroes rise to the occasion? Or will they falter in their duty to Theros?

Our Heroes face an ancient foe in the depths beneath the city, but there is more to these catacombs than meets the eye. Kair attempts to sabotage their plans in order to get what he wants. Meanwhile, Adelphos deals with some unintended consequences of using his new helm.

Experiencing the consequences of their choices, our Heroes are forced to make a deal with Narius in order to stay alive. Meanwhile, Calen struggles with his recent lapse into old habits while Thalassa tries to get closer to her mother and sister.

Our Heroes discover that Olantis may not be as lost or forgotten as they had anticipated. Trying to balance their distrust with their desire not to interfere with Thalassa's reunion with her family, Adelphos, Thesseus, Alondros and Calen try to figure out what feels off about her father. Meanwhile, Thalassa learns a secret that could lead to the downfall of her family's claim to the throne.

Our Heroes utilize Galliton's help in keeping a vulnerable Thesseus alive for longer while they remain underwater. Meanwhile Adelphos manages to get himself lost and finds a peculiar item that hides a special power. After getting what they need, our Heroes begin their dive into waters unknown, looking for a city that is said not to exist. What will they find when they get there? Will they find anything at all?