OAK is the story of two rival sisters, Sheela (elder) & Neethu. Both are victims of a dysfunctional family and are failure in forming healthy social relationships. Sheela is suffering from borderline personality disorder (BPD). She messes up everything and is insecure about her relationships. Her actions are often self-sabotaging. Neethu is a dopehead and is eccentric in nature. She is rebellious outside but broken inside. The time loop setting in the story serves as a metaphor in OAK.