NANU KI JAANU is the story of a ghost that falls in love with a crook. Nanu (Abhay Deol) is a small time goon who works with Dabbu (Manu Rishi Chadha). Their modus operandi is to rent a flat and then threaten the landlord to transfer the ownership in their name. One day, Nanu is returning home when he sees that Siddhi (Patralekhaa) has met with an accident. He refuses to be a bystander and takes her to the hospital. Siddhi is barely conscious but she sees Nanu helping her and she falls for him. Unfortunately, she passes away as soon as she is brought in the hospital. Nanu gets disturbed by the episode. Soon he realizes that the spirit of Siddhi has followed him to his posh residence in Noida. With no other option in hand, he finds out the address of Siddhi’s father (Rajesh Sharma) and meets him. But even that doesn’t help. He then approaches a ghost buster (Shreya Narayan) but it ends up in a disaster. To make things worse, Nanu loses interest in his illegal work and as a result their source of livelihood is in danger. What happens next forms the rest of the film.