After a bank job goes badly wrong, three desperate criminals take a young woman and a father and child hostage - it's the beginning of a frantic and violent road trip that not all of them will survive.

A bunch of crooked cops raid a ruined building located in an impoverished suburb of Paris, determined to furiously avenge the death of one of them, murdered by the ruthless criminal gang hidden on top of the dark labyrinth that will become a deathly trap when the living, unexpectedly turned into the undead by a mysterious plague, begin to devour the world.