Two sisters come together to spend Christmas with their families in their recently deceased parents’ falling down country house, with hilariously chaotic consequences, as ancient sibling rivalries flare up again to sabotage the hoped for season of good will.

A dying mother's life lessons to the husband and sons she left behind. Based on the best-selling novel by St John (Singe) Greene, the film is the story of Singe and Kate, a couple from North Somerset, whose lives were turned upside down when Kate was diagnosed with an incurable breast cancer. Over her last few days, she created her list: writing her thoughts and memories down, to help the man she loved create the best life possible for their two sons, after she was gone.

Tony Towers is a successful nightclub manager in 1985, a local celebrity and engaged to a much younger woman, Sue. But when he embarks upon the 3:17 to Nottingham for a Christmas family reunion, things get a little strange. Tony discovers that by moving up and down this fateful train, he can transport himself forward and backward to various stages of his life. Not only that, but the actions he takes in one carriage directly affect his life in the next. The question is, can Tony change his life – and the lives of the people he loves – for the better, or will he just make things worse?