A group of people meet for the first time in a long time and play a game that reveals each other's secrets.

A bullied teenager who is locked up at a juvenile detention center due to an unexpected accident, meets a mixed martial arts champion to break through his own limits.

Jin-soo is satisfied with life and tries to make the best of things. When his father disapproves of the girl he likes, he is determined not to give up. However, his resolve is tested with the death of a former classmate and news that his love interest is planning to leave Korea.