The case of a murdered sailor, $100 million in gold bullion and a ghost ship in the Great Lakes Triangle tests feuding Fraser and Kowalski.

The Simpsons go to a wonderful new museum. While there, Marge notices what a nice boy Ralph Wiggum is. Marge forces Bart to have a play date with Ralph. Ralph is so stupid and annoying that Bart wants to strangle him. Marge makes him go outside with Ralph. Ralph seems to be a pyromaniac. They go to the Wiggum's residence and Bart finds out that Ralph's father (Chief Wiggum) has a lot of neat stuff, including a master key that will unlock every door in Springfield. Bart goes over for a sleepover and swipes it. He and Ralph wander the town, running into the bullies. Nelson, Dolph, Jimbo, and Kearney take them to the abandoned prison. Bart and Ralph play around with the electric chair, leaving it on when they leave. Quimby wants to show the town the electric chair on the news. He wants to pretend to be electrocuted, thinking that the chair is off. Bart and Ralph see what is about to happen on the news and they have to prevent it. Bart goes to Lisa for a quick solution and she shoots a rocket at the prison which contains an explanation. Instead it goes into Burns' office, and he turns off the power after Quimby has almost been killed. Ralph's conscience tells him to burn down the house.