Nadhikalil Sundari Yamuna is a realistic and humorous movie portraying love, friendship and family relationships. The story revolves around two individuals having a healthy competition at a small town of Kannur in Kerala.

For every action, there is an equal and opposite reaction. What happens when your small action affects so many people's lives? how the butterfly effect plays an important part in all our actions forms the crux of N4.

A wayward young man's life is turned on its head when he begins to doggedly pursue the daughter of the new family in his neighborhood.