The evidence hangs on threads from a garment in Laura Keene’s thrift shop, a suit less than a year old but belonging to a young man who has left town, or so everyone thinks. During the town’s annual St. Patrick’s Day parade, a terrible discovery is made, and a story of blackmail, jealousy and greed are brought to light in the third installment of Margaret Evans's thrilling Second Treasures Mysteries, “Hanging By a Thread.”