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Chasing is a 2016 South Korean action comedy film about a top CEO (played by Kim Seung-woo) who has his cellphone stolen by a fearless gang of male high-school students led by the rebellious Han Won-tae (played by Hyuk of VIXX, in his film debut) and homicide detective (played by Kim Jung-tae) who loses his gun to the same gang of high-school students. Both the gun and the cellphone are very valuable to the CEO and detective. imdb.com