더 킬러: 죽어도 되는 아이

Tells a story about a retired killer named Bang Ui Gang who gets swept up in a case while using violence to protect an adolescent girl he suddenly becomes in charge of. Kim Yun Ji is an ordinary high school student, but she has a lot of hidden scars because she has no one she can depend on. After her unexpected meeting with Bang Ui Gang, she will heal some of her inner pain.