Coffeehouse manager Clare Cosi sheds tears of joy when her NYPD detective boyfriend surprises her with an engagement ring. But her bridal bliss is put on hold when a chilling mystery brings a wave of deadly danger to those she holds dear... After everything Clare and Mike have been through, they deserve a little bit of happily ever after. So when Mike decides to put a ring on Clare's finger, Clare's eccentric octogenarian employer is there to help. She donates the perfect coffee-colored diamonds to include in the setting and the name of a world-famous jeweler who happens to be an old family friend. But while the engagement is steeped in perfection, the celebration is not long lived. First, a grim-faced attorney interrupts their party with a mysterious letter bequeathing a strange, hidden treasure to Clare's daughter. Next, the renowned jeweler who designed Clare's ring is found poisoned in his shop. Both events appear to be connected to a cold case murder involving a sunken ship, an Italian curse, a suspiciously charming jewel thief, and a shocking family secret. With deadly trouble brewing, Clare must track down clues in some of New York's most secret places before an old vendetta starts producing fresh corpses.