Krusty finally drops by to have dinner with the Simpsons to thank Bart for believing him (see "Krusty Gets Busted"), and drops a bombshell: He real name is Herschel Krustofsky, and he is estranged from his rabbi father, who disowned him when Krusty decided to be a clown instead of a rabbi. Now, Bart vows to reunite Clown and rabbi.
Krusty cancels a dinner with Bart apparently not for the first time. This makes Bart extremely upset even to the point of turning in his membership badge. He sends a letter to Krusty and after his secretary reads it, she is very disappointed and forces Krusty to go. Marge tells Bart that Krusty is coming and he instantly cheers up.
At dinner, they ask Krusty to say grace and he starts to recite a prayer in Hebrew. Realizing that Krusty is Jewish, Lisa speaks of his heritage, making Krusty break down in tears. After some convincing from the family to why he's so depressed about it, Krusty tells the family his real name, Herschel Krustofski, and describes his upbringing in the Lower East Side of Springfield. His father was a Rabbi and he wanted Krusty to be a Rabbi too, but Krusty wanted to be a clown. One night Krusty got a chance to perform a rabbi's convention but he was sprayed by seltzer, his make-up fell off and his father recognized him and disowned him. After the story is over, Krusty seems very emotional and stays at the Simpson home until one AM. Looking at photo albums, he finally leaves and tries calling his dad, but is afraid that his dad will reject him again, and he doesn't say anything.
Bart and Lisa noticing him getting increasingly depressed (even to the point of crying during his TV show) they decide to try to locate and reunite Krusty with his father. They find him in a radio studio where a framed "Larry Davis Experience" gold record hangs on the wall. His father is still mad at Krusty, so after several tries, they finally convince Hyman to forgive Krusty by saying a quote from Sammy Davis, Jr., a Jewish entertainer just like Krusty, in which the entertainer makes a passionate speech about the struggles that the Jewish people have overcome. This finally convinces Rabbi Krustofski that entertainers have a place in Jewish heritage. Bart, Lisa, and the now proud father meet Krusty on the set of his show, where they reconcile their differences.