Sonyeon Gyodoso

Juyeong is incarcerated in a juvenile detention center after trying to kill his father, Gang-ryong. He holds onto the hope of a future with his childhood friend, Dayeon, in Seoul. This hope is destroyed when Dayeon is killed by a truck, and Juyeong discovers that his father was driving. After Gang-ryong wakes up, he tells Juyeong that if he wants revenge, he must become the leader of the detention center. Juyeong then seeks to gain power within the facility to carry out his plan.