Bart watches television and sees his psychotic nemesis, Sideshow Bob. We follow Bob, who has turned into an upstanding person while behind bars. He qualifies for a work release program, so his brother, Cecil, becomes his new boss. They are building a dam. Bart follows Bob, trying to catch him in another diabolical scheme. He cannot find any evidence, so he gets Lisa to help him. Then Bart and Lisa find some incriminating evidence and confront Bob. Cecil traps all three, revealing that he, not Bob, is going to destroy Springfield with the new dam. Bob, Bart, and Lisa form an alliance and try to stop Cecil. They succeed, and the police show up. Bob and Cecil both go to prison, even though Bob had nothing to do with it.

Hank is constipated, and everyone wants to offer an opinion on how to cure it. After a humiliating visit to a proctologist, he is told that unless his condition improves, his colon will have to be surgically removed. Peggy makes Hank change his diet and his living habits in an attempt to become regular again, but Hank decides he'd rather die with a burger in his colon than live and eat faux-food.

When a U.S. military general is inexplicably murdered in the back of his limousine, a paramilitary group is suspected. They believe it was a soldier who they liberated from a Vietnam POW camp and is plotting to kill certain corrupt military figures.