An unnamed American city, the present. Dumped by his latest girlfriend Sherry, ageing bachelor Don Johnston finds an anonymous letter on his doormat. The letter says that an ex-lover of Johnston's had a son by him 19 years previously, and that this young man might be on his way to see him. To find out who wrote it, Johnston's neighbour, amateur detective Winston, encourages him to visit former girlfriends. He visits four former lovers, where he comes face to face with the errors of his past and the possibilities of the future.
