Released after being wrongfully convicted and imprisoned for 13 years, a woman begins executing her elaborate plan of retribution.

Sang-hoon is a lowlife gangster, a debt collector exercising thuggish ways to collect his money. The recipient of nothing but anger since his childhood, he expresses himself through violence. When he finally encounters someone who can stand up to him, feisty school-girl Yoon-hee they become unlikely friends.

Ji-hyeon is enjoying her life after a female sex-change operation. One day a boy knocks on her door claiming that she is his father. Her attempts to act like an ordinary father conflicts with her life as a woman.