"Man to Man" is a stylish spy drama about a special agent who poses as a bodyguard for a movie star. Eun-gwan, a temperamental actor, primarily plays negative characters in action films and performs stunts brilliantly. When fame starts to wear him down, he hires a bodyguard to fend off intrusive fans and journalists. However, Eun-gwan has no idea that his new protector, Kim Sol-woo, is an undercover secret agent.