Storyline: Directed by Sujoy Ghosh, Kahaani 2 once again stars Vidya Balan as the protagonist. The film however, is completely different from its prequel. Kahaan 2 also stars Arjun Rampal in a pivotal role. The story revolves around a single mother, whose daughter has been kidnapped by some anonymous person. In her quest to get her daughter back, past must be dug out.