Jason dreams of skateboarding away from his dead-end life in suburbia to find his missing brother. Cutouts from the local newspaper inform him about runaways, a gang of misfits, and a strange place on the streets where anarchy rules. Fighting his insecurities, Jason realizes his one way to learn the truth is to cross the line and make contact with Adam, a punk he has a crush on.
Jason jumps at the chance to run away when his only friends, Kelly and Tanya, decide to escape an abusive home life. On the streets, they encounter a vicious gang led by Liev, a pseudo skin adorned with a teardrop tattoo and his cult of followers: strange Knappy armed with a blue lightning stun gun under his trench coat; firebrand Syd with the crazy eyes; the butch bruiser Hex; and a hulking, mute giant called Hound. The street punks taunt them with animal sounds, mischief, and violence in a sadistic game of sharks and dolphins, of predator and prey, as the runaways are hunted down through the street surf.
Amidst the chaos, Jason must choose between safety for his friends and his desire to find his brother as he is drawn to Adam and the dark world of Dolphin Street, a desolate area where the punks go. There are no rules on the streets, only a living nightmare leading to an abandoned house and the crawlspace underneath—a horror he may never escape.