When his teacher asks him to write a persuasive argument about something he really wants, fourth-grader Calvin creates a unique way to express his desire for a dog.

Calvin and his Mom's boyfriend, Ledward, are good friends. When Ledward wins plane tickets, he invites Calvin to go on a man trip—they'll fly to Hawaii, the Big Island, for a day, and go deep-sea fishing. Wow! Calvin's never been on a plane, or any boat but his skiff. What a day—Calvin catches his first big fish, an ono. But that's nothing compared to what happens when Ledward hooks a huge, and very angry marlin that charges the boat!