"When a New York diamond dealer and his wife are found dead in a chilling assassination, and a mysterious gem—the Lucifer Cut—goes missing, U.S. Treasury agent Alex Turner and his lover, the billionaire Russian diamond thief known as Slav Lily, are thrust into a web of global intrigue. Uncertain they can even trust each other, the two find themselves on the trail of a secret so lethal it threatens not only the world diamond trade but the national security of the United States."