A group of five teenagers of the same blood-type 'O' become friends at art college. Prim has a crush on bad boy Art, while her friend Foon likes quiet Puen. The five form a band and survive freshman initiation rituals, but conflict erupts when romances break up the group's harmony.

O-Negative

Aree is a young well off girl who gets involved with a lot of men. The problem is they all like her so much they are prepared to do anything to keep her even kidnap her and then kill anyone they consider to be their competition.