OK, Jaanu is a contemporary tale of 21st-century urban young romance mapped out in Mumbai and weaves its lyrical tale through the fabric of the city’s drastically bipolar persona. Adi (Aditya Roy Kapur) is a young game designer from Lucknow who dreams of emigrating to the US and living the American dream. He comes to Mumbai to work at a start-up game development firm. He plans to stay at an elderly couple’s home as a paying guest. Gopi (Naseeruddin Shah), an ex-High Court Judge had worked with Adi’s brother, Ravi. He is a straight-laced, somewhat strict old man. His wife Charu (Leela Samson), an erstwhile Hindustani classical singer is a cheerful, witty and quirky lady whose memory is fast fading away due to Alzheimer’s. Adi gradually strikes a bond with them, integrating into their lives. At a chance encounter during his friend’s wedding, he meets Tara (Shraddha Kapoor). She is a recent architecture school graduate working in an architecture firm. She dreams of going to Paris to pursue higher education. The cheerful banter soon gives way to a conversation where both Adi and Tara realize that they strongly feel that marriage isn’t for them. They are happy to find a kindred soul in each other who feels just the same. They ask each other out for coffee and start hanging out more often. They have fun in each other’s company. They both sense the palpable attraction but consciously try to keep a distance as they think the constant proximity can only lead to one thing but they find themselves drawn to each other and are unable to stay apart…and despite their conservative backgrounds, the relationship transcends into a physical one. Tired of hooking up secretly in her women’s hostel room they decide they want to move in together till they go their respective ways to America and Paris. Adi brings Tara to meet Gopi and get his permission. Gopi, the more old-fashioned one flat out dismisses the idea as absurd. As Adi tries to convince him, Tara strikes a chord with Charu over their shared love of music. Charu warms up to the young couple and that clears the way for Adi and Tara to stay in their house. Tara moves in with Adi into his PG to live in together. Tara’s mother and Adi’s family eventually get to know they are living in together and pressure mounts from them to get married. However, Adi and Tara steadfastly refuse to do so. Tara’s admission to a university in Paris comes through, which means she has to leave after summer. Adi’s game pitch gets approved. This is a big break through. Adi has to leave for the US in the coming 10 Days. With only 10 days left and parting imminent, Adi and Tara are forced to confront some matters of the heart. Living in together was always meant to be a stop-gap arrangement but an incident with the elderly couple forces them to relook at their lives and future.