In Cincinnati, Dets. Doug Lindle and Matthew Thompson investigate the murder of a man shot outside his apartment. They learn that moments before the murder, the victim received a house call from a stranger. They must uncover the identity of the unexpected visitor to find the killer. In Miami, FL, rookie Detective Mario De Los Santos gets his first big case: a triple homicide. He finds himself in the middle of a cycle of violence that threatens to spin out of control.