Flo is sick of Tokyo. Suffering from a crisis in confidence, she is stuck in a rut, her translation work has dried up and she's in a relationship that's run its course. That's until she stumbles upon a mysterious book left by a fellow passenger on the Tokyo Subway.

A lone white man lives beside the river on the edge of the Penobscot reservation in Maine. Charles spends his days doing odd jobs, looking after his depressive mother, and staring across the water to the house in which his half-Native daughter Elizabeth has grown up, unaware of his existence, her paternity hidden to protect her tribal status. Yet the cracks in the foundations of Elizabeth’s life are beginning to show, and Charles can see Elizabeth is struggling, much like his own mother does.

It is 1987 and in the aftermath of a great storm, Cora sets out with her nine-year-old daughter to register the birth of her son. Her husband has ordered her to follow a long-standing family tradition and call the child after him but when faced with the decision, Cora hesitates. Should her child share his name with generations of fearful men, or should he be given a chance to break the mould? Her choice in this moment will shape the course of their lives.