When Dashiel's body is found dumped on an East London wasteland, his best friend Danny sets out to find the killer. But Danny finds interaction difficult and must keep his world small in order to survive. By day he lives in an abandoned swimming pool and fixes electrical devices to trade for supplies, but by night, alone, he hunts sharks a reckless search for dangerous men who prey on the vulnerable. A chance meeting with an American boy selling himself on the streets throws this lonely existence into disarray. Micky is troubled, fragile, and Danny feels a desperate need to protect him from what, he doesn't know. As Danny discovers more about Micky, he realizes that what Micky needs saving from is the one thing Danny can't help him fight against. To save Micky, Danny must risk expanding his world and face something that scares him more than any shark ever could: trusting he will be accepted for who he is. If a freezing winter on the streets, a sadistic doctor, and three thousand miles don't tear them apart first, that is.