Dong-hyun is a high school student. One day, he falls from the rooftop and bumps into Pan-soo who is a passerby. Pan-soo is a member of a criminal organization. When the two men wake up in the hospital, they discover that they have switched bodies.

Jun-geun, a university student, keeps failing at job seeking in cold Korean job market. Furthermore, he gets kicked out of school dorm. Got nowhere to go, he goes to the beach nearby his school. He meets surfing there and everything changes.