After narrowly escaping from an ancient burial ground, long forgotten and buried underneath the marshes of Cape Cod, a group of friends emerge from the thick, marshy darkness, tattered and bloody, lucky to be alive.

They stumble upon an empty Cape Cod vacation house alongside the foggy marsh and break in to take shelter.

The unlucky travelers spend their St. Patrick's Day trapped between two evils, forcing them to fight, die, or go back the way they came.

[citation needed] The blatant sexuality of Muck polarized audiences and critics, but the film nevertheless received major distribution.

Ain't It Cool News wrote "About as subtle as a stripper in church, don’t expect your brain to be stimulated, but other areas (specifically your guts and below) are bound to be rumbled when you wade through MUCK.