Brook Sommers, a detective, is immediately attracted to Mace Knight when he takes on the assignment to protect her from the most dangerous hit man in the world. The problem is Brook is not the kind of woman who wants anyone watching over her. Mace Knight is an ex cop who was tossed from the SWAT team because of his unorthodox methods. His rough demeanor is one of the characteristics that attracts Brook to him. He is attracted to her as well but his past haunts him and his so called "second" job is in deep contrast to that of Brook's profession. The sexual tension heats up the longer they're together but complications keep them apart. She begins to wonder if his other occupation, whatever it is and she has an idea what it might be, will make it impossible for her to commit to him. He worries that his occupation could present a danger to anyone who loves him as it has in the past. Galloway is one of the most ruthless killers in the world. Mace already has a haunting history with him and he knows saving Brook will be one of his toughest assignments yet. Falling in love with her only complicates things. Will they ever get together romantically or, more importantly, can he save her from the killer?