LOCATION: SAN ANTONIO / PHOENIX In San Antonio, TX, Detective Timm Angell and his partners find a nameless man beaten to death floating in a creek; they must race to identify the victim and find anyone who may have known him. And in Phoenix, Detective Mike Polk and his team painstakingly reconstruct the final hours of a man found dead hogtied in a hotel room; the case takes a dramatic turn when they learn the killers may have been captured by the hotel's surveillance cameras.