Kat is an improv comedy teacher beginning to question if she’s missed her shot at success. When an undercover cop offers her the role of a lifetime, she recruits two of her students to infiltrate London’s gangland by impersonating dangerous criminals.

An exploration of the Met’s investigation into Sarah’s murder, how this devastating crime unfolded and its impact. Told by those closely involved in the case from the outset, many of whom are speaking on camera for the first time, including the Senior Investigating Officer, the Prosecuting Barrister and Sarah’s local MP.