I have to admit, sometimes I forget the appeal a good mainstream movie can have and the entertainment it can offer. "Split" does exactly that, through a Korean version of "Rain Man".
Cheol-jong used to be the best professional bowler in the country, but a tragic car accident destroyed his leg, his career, and even his family. Now, he plays in underground bowling matches that are organized by Hee-jin, an owner of a bowling alley who is in deep debt. The betting in this games is quite heavy, with some outsiders "patrons" participating, and Hee-jin hopes to repay her debt through the abilities of a limping Cheol-jong. However, his partner in the matches is not as good, and the two of them end up losing a lot of money, in a series of events that ends in violence. Their fate, though, changes when Cheol-jong meets Yeong-hoon, an autistic youngster with an incredible ability in bowling, but uncountable quirks. As the three of them start gaining money again, an old foe, Toad appears again threatening everything they have gained, while the tragic past of Yeong-hoon is revealed.