What brings ten strangers together to the island?

 Each guest has received an invitation from a Mr. or Mrs. U.N. Owen, or a Mrs. Constance Culmington, to come to the island. Vera Claythorne is going because Mrs. U.N. Owen has offered her a secretarial job. Phillip Lombard is going because he has been offered a hundred guineas to go. Miss Emily Brent received her invitation from someone she thinks she remembers on a previous holiday. General Macarthur goes on the pretense that he will be meeting up with some old military friends. Dr. Armstrong is on his way because he was summoned to care for a few elderly women with lots of money. Mr. Blore has been sent to spy on the other guests; he is a former detective. Finally, Anthony Marston recklessly drives his sports car towards the house with the belief that there will be a fabulous party with rich and famous people.