Jules Houplain

The lives of four childhood friends, Bilal, Romane, Sam and Victor, are seriously disrupted when a mysterious event separates them, sending them into parallel dimensions. They try to understand what happened and strive to turn the clocks back, in order to return to their former world.

The inhabitants of a high-rise building wake up one morning to discover that their building is shrouded in an opaque fog, a black matter that devours anything that tries to pass through it.

A middle-aged professor creates a fake Facebook profile to do some undetected online snooping, but it quickly escalates towards obsession.