Klein and Hagen are called to a stabbing at a shopping centre, where a foreign aid worker has been attacked and left for dead. Initially, suspicion falls on a local youth, Wayne Stevens, who has previous for similar offences and was seen running away from the scene. However, when another witness claims she heard the victim shouting something before she was attacked, the pair find themselves on the trail of a Rwandan war criminal, Colonel Augustus Ngeze, who is wanted for mass genocide and rape by the UN. Klein's personal views begin to cloud his judgement when they fail to obtain any evidence to prove Ngeze's identity, so he sets up a chance meeting with a Rwandan national in an attempt to identify him.

DC Duncan Lennox is on a week's secondment to Scotland Yard's Art and Antiques Squad. Investigating a young woman, Tessa Gannon, who tried to sell a forged painting to a gallery, Lennox finds a receipt from a gallery owned by an art dealer named Ivor Gregory, who has form for deception. Lennox befriends an artist named Richard Townes, who charges into Gregory's gallery as Lennox peruses the paintings. In the hope of getting a closer look at one of the paintings, Lennox arranges for his wife Shona to buy one of them. He gets it verfied, and is disappointed when it is an original. Shona insists on keeping it, but sends it back to the gallery to be re-framed. When the painting is returned, Lennox realises Gregory has swapped it for a fake, and it's the work of Richard Townes, but to his horror, Shona returns the painting to Gregory before the squad can arrest him. Tessa Gannon admits she had a painting copied by Townes, but she too is in possession of a fake. Gregory is arrested, and Lenn