A steamship originating from San Francisco has just docked on the South Pacific island of Tutuila at the port of Pago Pago, where some US Marines are stationed. Among the passengers is Sadie Thompson, for who Pago Pago is only a transit stop in that she is on her way to Apia on the nearby island of Upolu, where she is to start work for the steamship company itself. Circumstance...