The New York Times bestselling author of Always imagines life on Boat Street, a floating community on Seattle's Lake Union, home to people of artistic spirit who for decades protect the dark secret of one startling night in 1959. Fleeing an East Coast life marred by tragedy, Ada Santorini takes up residence on houseboat number seven on Boat Street in search of inspiration and new opportunities. When she discovers a trunk left behind by Penny Wentworth, a young newlywed who lived on the boat half a century earlier, she is immediately drawn into this long lost story. Ever-curious, Ada longs to know her predecessor's fate, but does not suspect that Penny's mysterious past and her own clouded future are destined to converge...