Mail from forty years earlier is discovered, and a letter from Homer Simpson's mother's old boyfriend states that he is Homer's true father. Homer sets out to find his supposed new father, leaving Abe behind.

When a romantic night ends in injury, Marge recovers by taking up kite boarding while Homer bonds with his hallucinated hernia; Lisa attempts to fix her parents' strained relationship by seeking advice from an unlikely source.

At a museum exhibit of Ancient Rome, Marge and Homer get into an argument about Homer's lack of ambition. They then imagine a Roman version of what would happen if Homer was more career-driven.

Homer and his teenaged friends are pursued by a killer clown in a spoof of Stephen King's novel "It".