So basically Len's brother stabbed Kian's brother at a party and in order to protect len's brother, Len's dad offered to pay for the grandpa's surgery only if Len takes the blame. So Len went to jail instead of his brother and this whole time Kian and his family thought it was Len and bully him
I still don't get it, like what happened between kian's brother and the uke (sorry, forgot his name )