* Judy: Her older brother, Stink, is getting all the attention because he's going on a big trip with their parents to California. This makes Judy feel jealous and unimportant.
* Rocky: His family is moving to California to be with Judy's family, but he's sad because he's going to leave behind his friends and his beloved dog, Mr. B.
The situation is complicated by a series of misunderstandings and miscommunications between Judy and Rocky, leading to an argument and a temporary rift in their friendship. The book focuses on how Judy and Rocky learn to communicate better, deal with their feelings of jealousy and sadness, and ultimately strengthen their bond.