From the author of the number one international bestseller The History of Bees, a captivating new novel about the threat of a worldwide water shortage as seen through the eyes of a father and daughter.

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.

2041: David flees with his young daughter, Lou, from a war-torn Southern Europe plagued by drought. They are on a desperate search to reunite with their family 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.