Shawn, the leader of a mercenary group, in need of a special medicine to find his sister, hides his identity and signs a contract marriage with Melody Linden, president of NovaTech. He joins as a security guard. He reveals his skills, settling debt disputes and thwarting kidnapping plots. Shawn risks life to protect his wife. They overcome conspiracies and put the snobbish Linden family in their place.