Ahead of the release, the creators of "The Witness" have unveiled its final trailer and it features all the lead characters, including former EXO member Luhan and Chinese actress Yang Mi.

The sneak peek video mainly revolves around the various challenges faced by two witness of a mysterious murder case. The primary witness is a blind girl, who was unknowingly with the killer at the time of the incident, and the other one is a delivery boy.

The 1.42-minute long promotional video begins with a shot of the female lead on a busy street waiting for a taxi. The clip then takes viewers through a shot of Luhan's character being physically tortured by someone.

In the trailer, the two are seen haunted by the culprit as they try to help the police force. It also shows the witnesses arguing with each other. While Yang Mi's character says, "I might not be able to see, but I can hear", Luhan's character disagrees with her: "It was a taxi. I saw clearly with these two eyes of mine".

"The Witness" is directed by Ahn Sang-hoon and it stars Zhu Yawen, Wang Jingchun, Liu Ruilin and Lai Yi. It is a Chinese remake of the popular Korean movie, "The Blind", and revolves around the investigation of a mysterious murder case and two of its eyewitnesses.

Watch the final trailer of "The Witness", which will hit screens in China on 30 October, below:

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