Based on the novel 'The Dinner' by Herman Koch, lawyer Jae-Wan faces a moral dilemma as he defends a killer while his honorable doctor brother Jae-Gyu prioritizes integrity over monetary gain. When their family gets entangled in a web of secrets, the brothers must confront their conflicting values. Tensions peak during a dinner, exposing deep emotions and moral complexities in this gripping drama about justice and privilege.