Homer returns to college for the second time, and he discovers his roommate is the Greek God Hades. Homer makes a deal with Hades to show him something cool about humans and go to the Elysium if he wins, or go to Tartarus if he fails.
First day of class. Homer takes Hades to mechanical engineer class to try and show him the wonders of engineering as something cool of humans. There they find Hephaestus as a classmate, and Hermes also shows up in their conversation.