Aboard the passenger liner Lusitania, war correspondent and American spy Kit Cobb has been assigned to shadow a German intellectual and possible covert agent who is believed to have information vital to the war effort. During the voyage Cobb is smitten with famed actress Selene Bourgani, who inexplicably seems to be working for the Germans. Cobb soon realizes this simple actress is anything but.

American spy and war correspondent Christopher Marlowe Cobb follows a man who may be a German secret service agent with vital information onto the Lusitania during World War I.