A mysterious phone message leads Banks to Harrogate to search for his estranged younger brother, while the team investigate the murder of a young woman.

When a body found at Halton quarry turns out to be his missing brother, Banks must return to his childhood home to inform his parents of the terrible news.

When a hitman bursts into the luxury home of Keith Rothwell and shoots him dead in cold blood, Banks is struck by the strange reactions of his family.

With Pamela Jeffries in a coma, Banks is even more determined to find Rothwell's killer. And against orders he decides to question MP Martin Fleming.

In spite of the trial of Owen Pierce collapsing, Banks still believes that he is the murderer. But Morton tries to persuade him to keep an open mind.