Kinn, the second son of a prominent mafia head, is ambushed by an enemy and meets Porsche, a college student who comes to his rescue, thus beginning their reluctant relationship as boss and bodyguard, which soon turns into something more.
A group of eight school friends take a trip to a mountain cabin as a final goodbye to one leaving for study abroad. Their reminiscing uncovers hints of a mysterious ninth person hidden in the house.
