Valentine's Day is fast approaching in Somerset Harbor, Maine, and Maggie Watson is in love—with some gorgeous antiques she bids on at a local auction. She's not the only one interested in the furnishings being sold off from the magnificent Twisdem Mansion, though. An enigmatic man in a fedora is equally enamored with the items up for sale but disappears before Maggie can discover his true identity. The excitement doesn't end when the bidding war is over. As Maggie inspects her new purchases, she finds hidden paperwork relating to a Vietnam War-era mystery and the fate of the entire Twisdem family. Soon, it becomes frightfully clear that others are equally intrigued by her discovery. Compelled to untangle the Twisdems' shadowy history, however, she ignores a series of increasingly sinister events and continues her search for the truth. In addition to a break-in at her antiques shop and a mysterious figure outside her window late one night, Maggie is blindsided by a visit from her father, who appears on her doorstep with a surprise announcement. As she struggles to come to terms with his news and their painful shared history, it brings to light what could be missing from her own life as well. Can Maggie and her father find common ground despite their distance in recent years? Is it possible for him, the ladies in the Historical Society, and handsome alderman James Bennett to convince Maggie that her avid curiosity is doing more harm than good? And, who is the mysterious Fedora Man, and what business does he have in Somerset Harbor? If Maggie isn't careful, her determination to unravel the Twisdem family's secrets could easily lead to heartbreak for some and certain doom for others.