Ten strangers, drawn away from their normal lives to an isolated rock off the Devon coast. But as the mismatched group waits for the arrival of the hosts — the improbably named Mr. and Mrs. U.N. Owen — the weather sours and they find themselves cut off from civilization. Very soon, the guests, each struggling with their conscience, will start to die — one by one, according to the rules of the nursery rhyme 'Ten Little Soldier Boys' — a rhyme that hangs in every room of the house and ends with the most terrifying words of all: '... and then there were none.'