A cowardly samurai is sent as an official executioner targeting the clan's former sword instructor, a man whose sword and spear skills are second to none.

A serial killer tries to live peacefully with his son in a countryside village. But a girl who knows he's a killer moves in. He decides he must kill her to protect his new life.

Slacker detective Jeong-min (Kim Dong-wuk) is assigned to investigate a serial killer case. For the first time in his career he puts his heart into his work but Yeong-seok (Yoo Oh-seong), an unemployed man with natural instincts as a detective, gets in the way by trying to catch the killer as well.

The cast is introduced to the settings and suspects of a murder case for the new episode. The cast then chooses their role in the episode, as a particular suspect or the detective.

In 1932, a prisoner escapes from a women's prison in northern China. Inspector Song Donglu is summoned to investigate the escape.

In search of their next hit series, filmmakers Adam Rodness & Stu Stone embark on an investigation to find a man they believe to be a serial killer. Are they in over their heads? Yes.

After Gyeong-bae's son is kidnapped, he receives a call from the kidnapper asking for 100 million won. The detectives are teamed up for the case, yet the culprit gets away at every opportunity.

The movie begins in the year 1995 where there were 5 peculiar murder cases. The murderer would always get someone close to the victim to witness how he would strangle the victim from behind with a rope but he would let the witnesses go and speak to the media on how the murders happened. Ito plays the role of Makimura, the police detective who was in charge of investigating the serial murders but failed to catch the cunning murderer and his respected superior ended up being killed as well. 22 years later in 2017 when the case is nearing its statute of limitations, a man named Sonezaki claims to be the culprit for the 1995 murders and even publishes a book titled "Watashi ga satsujinhan desu" to talk about the cases. Despite the disgust towards Sonezaki's actions, the intensive attention showered on him via the media and SNS makes him become the talk of town.

关于弗里茨·朗拍摄《M就是凶手》的幕后。

关于弗里茨·朗拍摄《M就是凶手》的幕后。