This Christmas, Maggie Watson holds the key to one of Somerset Harbor, Maine’s, most captivating mysteries. It's Christmastime in Somerset Harbor, Maine, and Maggie Watson is combing Carriage House Antiques and the rest of town for the perfect decorations to adorn Hayward Mansion in festive splendor. What begins as a typical trip to an estate sale quickly turns into a complex tale of intrigue when Maggie discovers a beautiful mercury glass vase with a dark secret. Nestled inside the vase is a heavy, jewel-encrusted key and an anonymous note pleading for help, though she has no idea who threatened the writer of the note – or when. Is the message as old as the vase, or does Maggie still have time to save the person who wrote it? And when she tracks down what the ancient key unlocks, will she be prepared for what she finds inside? This clever whodunit from Annie’s Antique Shop Mysteries series is a must-read for fans of cozy mysteries, antiques, New England, and female friendships.