In Birmingham, Detective Chris Anderson and the homicide team investigate the brutal murder of a young woman shot to death in a park in the middle of the day. Detectives must first discover the identity of the victim before they can track down their suspect and learn the disturbing motive behind her murder. In Minneapolis, Sergeants Chris Thomsen and Scott Larson investigate the murder of a young man beaten and shot during a gunfight in front of a strip club. Using surveillance video and forensic evidence, investigators race to find their murder suspect before some one else gets hurt.