On a hot, late August day sometime in the late 1930s, eight people arrive on a small, isolated island off the Devon coast of England. Each appears to have an invitation tailored to his or her personal circumstances, such as an offer of employment or an unexpected late summer holiday. They are met by Thomas and Ethel Rogers, the butler and cook/housekeeper, who state that their hosts, Mr Ulick Norman Owen and his wife Mrs Una Nancy Owen, have, oddly, not yet arrived.