In LA there’s a killer on the loose. He kills young and rootless girls and he always kills in threes. Back in Dublin, Ed Loy is reunited with Jack Donovan, a film director friend from LA. When the victims of the "Three-in-One Killer" are discovered in LA at locations Jack used for his movies, Loy begins to suspect Jack. He flies to LA, hoping that whatever he finds will point away from his old friend. And then, when he finally unearths the truth, it looks like it may be too late. In Dublin, the killer has broken his pattern. Time is not on Loy’s side as he mounts a desperate fight to outwit a ruthless psychopath and save the last of the lost girls.