When a pair of microbrewers accidentally run over a black cat, they go to the owner's home with the best of intentions. Unfortunately for them, the animal belonged to a coven of witches, and the eldest witch doesn't take kindly to the boys' peace offering of beer. She curses their freshly brewed batch of Slacker Lager, proclaiming "After you drink that beer, liver damage is going to be the least of your problems!" The superstitious Jeff wants nothing to do with the supposedly cursed ale, but Preston insists that they sell it as planned. They deliver cases to local bars, liquor stores, and friends. As the characters drink the alcohol, they drop like flies after suffering awful deaths.