Heart (1999)

Gary (Eccleston) is wheelchair bound and awaiting a heart transplant. When a young man, Sean, is killed in a motorbike accident, Gary receives his heart. Maria (Reeves), Sean's mother, tracks down the man with her son's heart and gets to know him and his wife, Tess (Hardie). Maria's obsession with the only piece of her son still living is the centre-piece to this unique psychological thriller.