A young and modern couple who go to France to explore an underwater house and share their findings on social media undergoes a serious change of plans when the couple enters the interior of a strange house located at the bottom of a lake and their presence awakens a spirit dark that haunts the house.

A young and modern couple who go to France to explore an underwater house and share their findings on social media undergoes a serious change of plans when the couple enters the interior of a strange house located at the bottom of a lake and their presence awakens a spirit dark that haunts the house.