In 2019, seventy-year-old Signe sets out on a hazardous voyage to cross an entire ocean in only a sailboat. She is haunted by the loss of the love of her life, and is driven by a singular and all-consuming mission to make it back to him.

In 2041, David flees with his young daughter, Lou, from a war-torn Southern Europe plagued by drought. They have been separated from their rest of their family and are on a desperate search to reunite with them once again, when they find Signe's abandoned sailboat in a parched French garden, miles away from the nearest shore.

As David and Lou discover personal effects from Signe's travels, their journey of survival and hope weaves together with Signe's, forming a heartbreaking, inspiring story about the power of nature and the human spirit in this second novel from the author of the "spectacular and deeply moving" (New York Times bestselling author Lisa See) The History of Bees.