Lee Youngd holds nine black belts in various martial arts, yet works as a delivery driver. After intervening in a fight and subduing an ex-prisoner, he received an award and was recommended to join a team monitoring ex-convicts. Youngd accepted, facing demanding shifts but determined to protect innocent people. While on duty, he helped catch an ex-convict attempting assault. Another alert led to the investigation of suspicious movements near a child care facility. Lee Jongin was monitored, showcasing Youngd's commitment to public safety. His dedication to his new role as a martial arts officer was evident, even in challenging situations.