Part 4/7:
A Dark Turn of Events
While Clara returns to the pool, her ulterior motives surface. Instead of assisting, she instead devises sinister plans that subject the sisters to freezing temperatures and an imminent threat of suffocation via a pool cleaning system. When her actions escalate, so does the sisters' desperation. In a moment of survival instinct, Jonna tries to reach Clara with a plan to fight back, leading to an accidental injury that fuels Clara's animosity.
As the hours pass and the struggle intensifies, Bree's health deteriorates. Facing the impending crisis, the sisters' past traumas resurface as they confront the buried skeletons of their family's tragedies.