Based on real events, this film depicts the story of a school for the hearing-impaired where young deaf students were sexually assaulted by the faculty members over a long period of time.
Three different swordsmen -- a swordsman who is going blind, the best swordsman in Joseon Dynasty, and the best swordsman in Qing Dynasty who aspires to be the best even in the Joseon Dynasty -- meet each other for their own reasons.
Woo Jin takes care of his son Ji Ho alone after his wife Soo A passed away. Before she passed away, she promised she would be back on a rainy day one year later. One year later, Soo A appears again, but she does not remember anything.
Joo-hyeop is a serial killer living in countryside hiding his identity. When his son befriends a girl who is the only person that knows his true identity, Joo-hyeop decides to kill her for the sake of him and his son.