Yoo Jin Kook is a veteran homicide detective who is getting weary of his job. The only light in his life is his younger sister, Yoo Jin Kang. He is very protective of her like a father figure ever since they lost their parents. When Jin Kook starts investigating a suicide case of a college student, he can't help but feel that the dead student's boyfriend, Kim Moo Young, may have been responsible for her death. Soon after Jin K
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