It is 1913 and Leon Courtney, an ex-soldier turned professional hunter in British East Africa, guides the rich and powerful from America and Europe on big-game safaris. Leon had never sought fame, but an expedition alongside U.S. President Theodore Roosevelt has made him one of the most sought-after hunters on the continent. Soon, he finds that with celebrity comes not just wealth--but also danger.
Leon is recruited by his uncle Penrod Ballantyne, commander of the British forces in East Africa, to gather information on one of his clients: Count Otto von Meerbach, a German industrialist whose company builds aircraft and vehicles for the Kaiser's burgeoning army. While spying, Leon falls desperately in love with von Meerbach's beautiful and enigmatic mistress, Eva von Wellberg.