Grayson, Mike, and Ian have been best friends since they were kids. This summer they are prepared for another epic time on "the Locks" of Winlock Harbor, but troubles and sorrows arise. Ian's father does not make it through his latest military deployment; Mike's family's financial troubles force him to get another job; and Grayson suffers an accident, leaving him with an injured throwing arm and uncertain future. When one of the boys breaks their unspoken code of never dating a friend's sister or ex-girlfriend, tensions rise, and the three friends might split permanently.