English detective, DCI Alan Banks, returns in this fourth series of the popular crime drama based on Peter Robinson#s novels with three new, original stories set against the striking backdrop of rural and urban Yorkshire. In What Will Survive, DCI Banks struggles to cope with the sudden death of his mother, as he investigates the murder of a young Estonian woman and the disappearance of her drug-dependent sister. Evidence seems to point to a young man with autism who is killed in an arson attack. But Helen suspects that the real culprit is a local businessman looking to shift the blame. Banks and his team uncover a dark world of vice in a desolate town and a terrible abuse of human rights. During the second story, Buried, Banks must navigate difficult emotional territory when the body of an eminent lawyer is washed up in an underground river and he suspects a member of her grieving family is responsible for her death. Her devout Muslim brother believes she was having an affair with a former employee, but when the employee#s body is also discovered, Banks finds himself running a double murder investigation. The team must unravel a web of lies and secrets to discover the unsettling truth behind these deaths. In Ghosts, when the body of a university student is found dumped in a ravine, his friends claim he was a model undergraduate. But officers Annie and Ken soon discover that he had a double life manufacturing ecstasy. Helen#s world is turned upside down when she realises her former lover, an undercover police officer, is following their main suspect. She is horrified when an angry Banks tells her that this man may be behind the murder. Helen sets out to learn the truth and discovers the dead boy is actually the officer#s son. Banks and Helen must find him before he exacts revenge on the real killer.