Through entries made in a diary that Leigh (now 14 years old) room, tells of the dog that he and his friend find abandoned on the beach. The boys agree to joint custody of the pet, which they name Strider. But it soon becomes evident that it is Strider that has rescued Leigh from apathy. Leigh's relationship with his pet helps him deal with what seem to be difficult problems: his parents' separation, his dad's imperfections and even his attraction to a girl at school. Strider changes Leigh, as he finally begins to accept his parents' divorce and gets to know a girl he's been admiring.