It's Christmastime in Somerset Harbor, Maine, and the little town is aglow with the warmth of the holiday season. Maggie Watson--together with her friends in the historical society--is combing the Carriage House Antique Shop and the town for the perfect decorations to adorn the local 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 makes a shocking discovery amid the piles of unwanted junk: 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. It appears someone in Somerset Harbor has something other than peace and goodwill on their mind this season. But who has threatened the writer of the note? And when? Is the message as old as the vase, or does Maggie still have time to save the person who wrote it? As Maggie strives to unlock the truth, she learns that Adele Kessler, the late owner of the vase, had become a recluse in recent years, surprising everyone after her many years of hosting renowned social events, including fabulous Christmas parties. Her estranged son hasn't been heard from since his days as a troubled teenager, and the only other person who might be able to provide answers---a reporter---has gone missing. There are secrets and lies at every turn, but each serves to strengthen Maggie's resolve to find out who wrote the note she found and save the mystery woman from whatever horrible fate awaits her. This Christmas, Maggie once again finds herself in possession of the key to one of Somerset Harbor's captivating mysteries, and she must rely on her faith and friendships to guide her through the many twists and turns of her most riveting riddle yet. But when she finds what the ancient key unlocks, will she be prepared for what she finds inside?