A photographer is arrested on suspicion of murdering one of his models. The discovery of a blood-soaked t-shirt at his trashed studio, and the evidence of his own pictures, suggests a second suspect may have delivered the fatal blows to the victim's head. Emma and Beth tangle with a trio of truculent young women whose troubled history of deceit and blackmail leads to violence, putting the young officers in danger. Sally and Reg attend the scene of a suspected assault. (thetvdb.com)