Jae-wan, a criminal defense lawyer who has no problem defending murderers and his younger brother Jae-gyu, a morally adept and warm pediatrician meet once a month with their wives for dinner. One day, a security camera footage of a teenage boy and a girl beating a homeless man to death goes viral. The police begin their investigation but since the perpetrators’ were not visible to the camera, the case does not progress. But having seen the footage, Jae-gyu’s and Jae-wan’s wives discover a shocking secret.