The world may be recovering from a global zombie outbreak, but that's not stopping Dean from getting married. His friends have organised the ultimate stag weekend. In the aftermath of the pandemic, private companies are creating money-spinning ways of disposing of the undead. The stag party, along with a PVC-clad stripper they've hired, go to play 'Zomball' - like paintball, except that you get to shoot zombies. What begins as adrenaline-fuelled entertainment, soon turns into a game of life and death, when the stags break the golden rule and the zombies attack. Suddenly, the mother-in-law is the least of Dean's problems, as he and his friends fight for survival.