1838: when a terrible storm blows up off the Northumberland coast, Grace Darling, the lighthouse-keeper’s daughter, knows there is little chance of survival for the passengers on the small ship battling the waves. But her actions set in motion an incredible feat of bravery that echoes down the century. 1938: when nineteen-year-old Matilda Emmerson sails across the Atlantic to New England, she faces an uncertain future. Staying with her reclusive relative, Harriet Flaherty, a lighthouse keeper on Rhode Island, Matilda discovers a discarded portrait that opens a window on to a secret that will change her life forever.