Well basically, Yoohans(the delivery guy) little brother got stabbed by the guy he'd previously taken money from. After all that we're back to the present where we can hear this douchebag who used to live with Yoohan brag about how he basically caused Yoohans little brothers death by telling the man with the knife to " kill him instead of me ", after the little brothers death the douchebag ran away with Yoohans money!! The rest is a spoiler but that pretty much sums it up :)
good sleep schedule? Not round here...