The sequel to Smithy's Cupboard finds Dave Smith's daughter Suzie in the USA on tour with her country and western band. She impersonates Johnny Cash and June Carter with her rendition of 'She Walks the Line'. However, she also has a top secret mission: after courageously disarming a crazed man outside the entrance to the White House, she has been recruited to gather intelligence for the Secret Service. Suzie falls in love with an agent who has a lot of military experience and an undiscovered enemy lurking. Extreme danger follows Suzie, with twists, turns and dramas which she overcomes in her uncompromising fashion. The spirit of her mother offers encouragement and cautions her about aping her father, but in the end she knows what she must do to stop the stalker, because Suzie Smith is her father's daughter—a natural born killer.