Four guys on a bachelor party get off the subway at a station that shut down in the 70's and, after watching a transit cop get brutally murdered, find themselves running for their lives beneath the streets of NY.

If the mysterious plague sweeping the nation wasn't bad enough, Dean is still going ahead with his doomed wedding tomorrow morning. That leaves him with a choice. Pick up the button holes and chocolate fountain as instructed by bridezilla, Elaine, or go with five mates (and a stripper) to play "Zomball" at a top secret military compound where you get to shoot zombies with huge stun guns. Disobeying the golden rule of Zomball ('never never humiliate a zombie') the stags face overwhelming odds from the massed undead and each stag is hunted down. The truth about Zomball is finally revealed and suddenly the mother-in-law is the least of Dean's problems....