 Alan and Tricia Hamilton are very happy. He s the head of a building firm and on top of his game. She s a part-time beautician and mother to their two sons. One day their perfect, if unremarkable, life is torn apart when a last-minute decision to pop out for a quick drink with a colleague sees Alan step out in front of a passing car. The resulting accident leaves him in a deep coma but with remarkably few physical injuries. Desperately worried about him, Tricia is delighted when he comes round - only to discover that the man she loved has disappeared. His behaviour s changed, he s lost all of his inhibitions and he veers from angry and frustrated to vulnerable and childlike. Simple tasks like making toast and getting dressed are beyond him, he s unable to hold down the job he loves and he plays and laughs with his sons as if he s a child. Alan s behaviour puts his relationship with Tricia under intolerable pressure. She longs to find the husband she loves in there somewhere - but fears she may have lost him forever.