A man lies dying in the street from a stab wound to his heart. A friend at the scene is desperate to find out if he will survive, but it's now a crime scene and he's not allowed to see the victim. Paramedics can't save the man so the police begin a murder inquiry, and they believe the friend may be able to tell them what happened. But they know that without his co-operation they may struggle to prove their case. Cameras follow in intimate detail a tragic case with a surprising and disturbing twist. This is real-life crime drama at its most intense.

A teenager is rushed to hospital with serious injuries that suggest she's been tied up and assaulted. She says she got them during sex with her boyfriend. But then she disappears from hospital...