Once a teenage heartthrob, Nam Hyeon-soo has transitioned into his thirties and now hosts a radio show. His life takes an unexpected turn when a young woman, Jeong-nam, arrives, asserting that she is his daughter. She also introduces her son, claiming he is Hyeon-soo’s grandson. A DNA test conducted by Hyeon-soo’s brother confirms their familial ties. This revelation prompts Hyeon-soo to try to prevent a public scandal about his previously undisclosed children.