Homer realizes he's never found out what his middle initial "J," stands for. He asks Grandpa, who is also stumped. Grampa takes Homer to a farm that used to be a commune where Homer's mother lived. There, Homer finds a mural his mother dedicated to him with the inscription, "With Love, to My Son Homer Jay Simpson."

Inspired by the mural, Homer decides to become a hippie. He befriends two of his mother's old friends, Seth and Munchie. When he asks them to go on a "freak out" with him, they reveal that they now run a juice business on the farm. Accusing them of selling out, Homer convinces them to go freak out "squares" with him. At the end of the day, they return to the farm, only to discover that Homer's Frisbee has jammed Seth and Muchie's juice machine, destroying their entire shipment of juice.

Trying to make it up to his new friends, Homer sneaks over to the farm at night and makes a whole new batch of juice. When Seth and Munshie wake up in the morning, Homer has already shipped out the new batch. when they ask Homer where he got the extra vegetables, he shows them that he harvested their "private" garden. Soon, all of Springfield is hallucinating from Homer's vegetable juice made from carrots and peyote. The police raid the farm, and Homer tries to share the hippie philosphy of freedom, love, and peace, placing a flower in the barrel of Chief Wiggum's gun. Wiggum shoots Homer, embedding the flower in his head.