A talented martial artist who can't walk past a person in need unites with a probation officer to fight and prevent crime as a martial arts officer.

Min-soo is about to get married when his fiancée suddenly admits that she is allergic to dogs. Now the guy's best friend, the golden retriever Rooney, needs a new family. With the help of his cousin and social media, Min-soo starts looking for a new home for Rooney.