
When Uncle Swiggy visits his favorite nephew at Johnny and Scott's clubhouse, he sees Aunt Zelda and falls head-over-tentacles in love with her.
Johnny and Scott bring Sigmund home from the beach and hide him in their clubhouse from Zelda, who invited the sherriff over for dinner. Meanwhile, Sigmund's family gets a visit from their rich Uncle Siggy, who demands to see Sigmund or he'll disinherit the family.
Sigmund falls in love with Fluffy, a dog that belongs to Johnny's girlfriend, Peggy. Sigmund's family schemes to get him back by tricking him into meeting Diana Demon, a sea monster actress who Sigmund has a crush on.