New York, 1907. Seventeen-year-old Caitlin Quinn leaves Ballykelly for America with nothing but a desperate letter from her missing twin sister, Mary. But instead of answers, she finds a glittering city built on lies, where crooked deals and criminal empires rule and someone is willing to kill to keep Mary's secret buried.

When Caitlin's search collides with that of William Furey, a feared gangster with his own orders to find Mary, the two form an uneasy alliance that soon becomes something more. A gripping, romantic historical crime thriller from the producer and writer behind Gossip Girl and Gilmore Girls.