At the bottom of an artificial lake in Pella, the past does not rest. It simply waits for the water level to fall. When hydrogeologist Theodora Charalampidou returns to the Upper Lake, the landscape of her childhood has turned into an eerie mud desert.

As the waters recede, the old settlement emerges like a ghost, revealing a grim discovery: the dead bodies of a Pontian family who disappeared half a century ago. For the village, it is a secret buried underwater. But for Theodora, it is a revelation that threatens to shatter everything she knows about her roots.

Police officer Iordanis Salonikidis is called to provide answers in a case that time should have erased. However, in Upper Lake, the locks didn’t just secure doors. They also silenced mouths. And now these locks are beginning to break. From within.

How deep can you dive into the truth without drowning? Catharsis is a journey through memory and guilt. Where evil is inherited, and the truth demands the ultimate price.