Detective Inspector Rowan Jackman faces the most difficult case of his life. His sister-in-law, Sarah, disappears to London and throws herself into the river. As a woman with a seemingly happy home life and two beloved sons, what drove her to this? As DI Jackman and DI Evans dig into to Sarah's life, Jackman realises he knew almost nothing about his sister-in-law's past. Then, they discover a woman in a neighbouring village died in similar circumstances. What is the connection to a convicted murderer whose family are convinced he's innocent? Who is really pulling the strings? And in a case so close to home can Jackman keep his feelings under control?