Stan has one month to fulfill his destiny of destroying humanity; at his birth month party, Stan's father tells him to leave Hell for New York City to prepare for Armageddon, and Stan takes advantage of the trip to pursue his acting dreams.

At a family breakfast in Hell, Stan undergoes an invocation and is summoned back to New York City; worried about his son, Satan orders Samael to rescue Stan, but Samael ropes in Mefisto, who already has another demonic mission helping a ghost.

At a family barbecue, Stan and Satan have a father-son talk full of misunderstandings, leading Stan to make a shocking pledge; while Samael goes with Stan on this adventure, Mefisto promises to help a vengeful bear at the zoo.