OK JAANU is a love story about a young couple’s live-in relationship and the ups and downs that they face in their respective lives. The film starts off with the ‘alighting’ of Aditya Gunjal aka Adi (Aditya Roy Kapur) and the ‘suicidal threat’ of Tara Agnihotri (Shraddha Kapoor). As luck would have it, these two rank strangers (Adi and Tara) bump into each other at a common friend’s wedding and hit off from there. Right from the word go, both, Adi and Tara are extremely clear about what they want from their respective lives. While Adi wants to make it big as a video game developer, Tara, wants to learn architecture is Paris. Despite being career oriented, Adi and Tara start enjoying each other’s company very much. At the same time, they are in unison with the fact that, despite being in love, they will not get married, for their personal reasons. A few days of knowing each other, Tara moves in to stay with Adi, who is himself living as a house guest with Gopi Shrivastava (Naseeruddin Shah) and his Alzheimer affected wife Charu Shrivastava (Leela Samson) in Mumbai. One fine day, while Adi gets a call to work in USA and Tara decides to go to Paris, they realise that they will be missing each other’s company.