For as long as he can remember, Tom Chance has had a life which lived up to his surname”from the coincidence that led to his meeting his true love to his run-ins with the law for crimes he didn't commit (run-ins that eventually have the police sergeant ordering his men not to arrest Tom, no matter what the circumstances!). Tom Chance is a very likeable bloke to whom bizarre things which are a-million-to-one-chance for most people happen to Tom Chance as a matter of course. For example, his shy librarian girlfriend Alison Little becomes enmeshed in Tom's bizarre world when a series of strange "coincidences" lead to the pair being arrested for housebreaking while dressed only in underwear. Nothing is ever Tom's fault, of course, just the inevitable chain of coincidence that seems to follow him wherever he goes.
Cases of mistaken identity bring about the chance first meeting between Tom and Alison.
Tom is mistaken for a crooked car dealer.
The bank fails to pay Tom's bills.
Tom's party for Alison is a disaster.
Tom's bad luck affects Alison's visiting cousin.