Music teacher and part–time lingerie saleswoman Marnie Lundy's biggest thrill is playing piano at the local mall...until the night everyone seems to think she's somebody else! Suddenly she's being addressed in code, menaced by a man who claims to know her intimately and rescued by a handsome spymaster who thinks she's a threat to national security! But OPUS agent Noah Tennant has a feeling she's more Mata Hari than Mother Teresa. Could a woman this sexy truly be innocent, or is Marnie his opponent in a deadly game of spy vs. spy?