American doctor, Natalie March, travels to Siberia to find her estranged grandmother, only to uncover dark family secrets and a dangerous international plot. With a demanding career as a successful surgeon, Natalie March has little time for anything outside of caring for her mother, Vera. As a Russian immigrant, Vera is haunted by the childhood memory of her parents being sent to the gulag, Stalin’s notorious network of labour camps. When a young woman named Saldana shows up at Natalie’s office an d claims to be her cousin, she is told a shocking truth; her grandmother, Katarina Melnikova, is in fact still alive. At first, Natalie is thrilled at the idea of reuniting Vera with her mother, but Saldana’s ulterior motives immediately threaten this peaceful reunion. Natalie is determined to find answers, a search that sends her i nto brutal and wintery Siberia. Once there, Natalie is quickly drawn into a web of dark family secrets and dangerous international intrigue. How far will Natalie go to find Katarina M? Can she trust all th ose she encounters? And what will she risk to protect her family – and her country – from a deadly threat?