As healing begins, the guests begin to doubt the retreat's unconventional methods. They came for massages and relaxation, not to face their own mortality.

As the guests learn more about Tranquillum's unique protocols, everyone must decide if they will continue under Masha's care. Meanwhile, Masha is receiving mysterious threats of her own.

Zoe's birthday celebration reopens old wounds, even as the group begins to grow closer.

As the protocol escalates, relationships are strengthened, even as the effects of the treatment become more unsettling. Masha reveals her unique treatment goals for the Marconi family.