At the 1936 Berlin Olympics, American swimmer Sydney Stringfellow finds herself falling in love with Horst Gerhardt, a dashing young German. When the rising tide of global conflict tears them apart, Sydney returns to America, where she finds love again-in the arms of Jimmy Branch, an American man who takes her hand in marriage before shipping off to fight in World War II. And that is when Horst reappears in Sydney's life, drawing her into a dilemma of passion, betrayal, and espionage.