Dr. Natalie March always believed that her grandparents perished in the gulag, but when a young Russian woman appears in her office claiming to be her cousin, Natalie must face a surprising truth: her grandmother, Katarina M., is still very much alive. Natalie eagerly travels to Siberia to meet her, only to be drawn into a web of mystery, espionage, and danger that will push her to the limits of her endurance. Finding Katarina M takes the reader on an extraordinary journey across Siberia – to reindeer herding camps, Sakha villages, and parties with endless vodka toasts – while it explores what it means to be loyal to your family, your country, and yourself.