Maggie Riley has settled into her new life in Thailand, working aboard her sailboat and doing her best to leave the past behind. When she receives an unexpected letter from an old World War II vet, claiming to have served with her grandfather who went missing in action, Riley is once again pulled into the intrigue that tore her family apart and led to the disappearance of Cole Thatcher, her former search partner—and love of her life. Armed with the secret code her grandfather left behind, Riley must head to the Philippines to hunt for a mysterious shipwreck, uncover the truth of Yamashita’s gold, and find the answers to old questions about her own family.