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.

Autumn 1915. World War I is raging across Europe but Woodrow Wilson has kept Americans out of the trenches--though that hasn't stopped young men and women from crossing the Atlantic to volunteer at the front. Christopher "Kit" Cobb, a Chicago reporter with a second job as undercover agent for the U.S. government, is officially in Paris doing a story on American ambulance drivers, but his intelligence handler, James Polk Trask, soon broadens his mission....