While diving in a remote French lake, a couple of YouTubers who specialise in underwater exploration videos discover a house submerged in the deep waters. What was initially a unique finding soon turns into a nightmare when they discover that the house was the scene of atrocious crimes. Trapped, with their oxygen reserves falling dangerously, they realise the worst is yet to come: they are not alone in the house.
The new drug Kimanga is everywhere in the city. And the apocalypse is near. The first sign is a plush pig. But two guys are going to clear the city out and stop the apocalypse.