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When four sorority girls conjure an ancient demon that has spent eternity trapped inside a crystal ball, the only hope for salvation lies in two antique dealers with the power to banish the hell-spawn back to the pit. The dance-a-thon is under way, and as a murderous demon comes out to play, a couple of nerdy frat boys prepare to dance the night away. But this demon is more interested in wholesale slaughter than busting a move, and with little time to lose before the souls of the contestants are all consumed, a pair of adventurous antique dealers set out to send the creature screaming into the inferno.