Believe but be doubtful.

A serial killer is caught for his seventh murder. A cop tries to solve the first six cases with the killer's help, but starts to suspect that he has ulterior motives. Based on a true story.

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Main Cast: Kim Yoon-seok, Ju Ji-hoon, Moon Jeong-hee, Jin Sun-kyu, Jung Jong-joon, Heo Jin, Kim Joong-ki, Kim Young-woong, Jeong Gi-seop, Kim Mi-hwa

Director: Kim Tae-gyoon

Writers: Kwak Kyung-taek, Kim Tae-gyoon

Editor: Kim Sun-min

Cinematographer: Hwang Ki-suk

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