Room 412

Eight months after her husband burned to death in a locked hotel room, New Orleans locksmith Sylvia Rousseau still doesn't believe the fire marshal's story. A Havana woman in gloves changes everything, offering three hundred dollars to crack an iron box with no keyway—stamped with the same maker's mark Marcel sketched the week he died. Inside that box is a secret worth killing for, and every man who wants it already knows Sylvia's name. Some doors should stay shut.