Guardian

Original title: 보호자

Directed by Yoo Won-Sang

Jeon-mo is a former firefighter and a passionate father of his two little children. One day his life is collapsing when his daughter is missing. Before Jeon-mo is able to call the police, he is contacted by the mysterious man who kidnapped the girl. But instead of money, the abductor orders Jeon-mo to kidnap another child in exchange for the life of his daughter.