Crime drama series. A mysterious phone message leads DCI Banks to Harrogate to search for his estranged younger brother, Roy. Meanwhile, at the scene of the murder of a young woman found in her car, Banks's team are introduced to DI Helen Morton, drafted to cover Annie's maternity leave. When Banks's name and address are found in the pocket of the victim, Helen speculates that their boss could be a suspect in the case. Unaware that his team are searching for him, Banks begins to delve into the life of his brother, and soon uncovers questionable business transactions and associates, as well as an angry fiancee and an affair. Could Banks's brother be the killer his team are searching for?