Tobias hates mash and Steve hates Tobias, but when they discover their mom to be patient zero in a world of flesh-eating zombies, the torn apart brothers get pieced back together, only to be torn apart all over again. Underpinned by a deep sense of tragedy and fuelled by meticulously choreographed fights, improvised comedy and a dystopian backdrop collide to tell the nightmare story of an absentee father, a bed-ridden mother, and an apocalypse bursting through the door.