 A man sells his soul to the devil and shows up on a killing spree at Mardi Gras in New Orleans. Leaving a trail of bodies, the apparently indestructible demon challenges the detective to stop him by the end of Mardis Gras or lose his soul. With help from a voodoo lady and his police captain, who remembers the demon from a past Mardis Gras, he gets closer, but risks the destruction of his ex-wife and newly found girlfriend.