LILLY REBECK finds herself completely alone in the wake of her father’s death in Afghanistan, her mentor’s abandonment, and her mother’s growing detachment, her only solace being her violin. Driven by loneliness, curiosity, and a unique musical connection, Lilly befriends a mysterious Russian tenant upstairs, unaware that her newfound friendship with this woman would plunge her into a world of arson, murder, and fleeing both the FBI and Chechen mafia. When her world collides with Alexei Volkov, a Russian immigrant paying off an old debt to Chechen mafia, and Anna Stern, a tormented and overworked FBI agent, Lilly must decide how much she’s willing to sacrifice for a woman that she has grown to love as a mother, a woman that could be a spy.