LOVE AAJ KAL is the story that tackles the ever-changing dynamic of being in and finding love. Veer (Kartik Aaryan) and Zoe (Sara Ali Khan) are based in Delhi and they meet one night at a nightclub. Both attempt to get intimate but Veer backs off at the last minute.
Veer however realises Zoe is special to him. He finds out that she works from a co-working space. He also lands up there. Zoe is at first irritated with him but she's interested in him. Meanwhile, Raj (Randeep Hooda), the owner of the co-working space, witnesses their love blossoming in front of his eyes. Zoe shares her views with Raj that she wants to have a casual relationship and doesn't want to get into a serious relationship so soon.
At this, Raj begins to narrate his own story. This is a time when he was Raghu (Kartik Aaryan) and was a school kid in Udaipur. He is crazily in love with Leena (Arushi Sharma). She too falls for him and one day, both get caught. Her family asks her to move to Delhi. Raghu, madly in love, follows her to the capital city. He starts to work as a waiter. Zoe is enchanted to hear about Raj's story. She decides to give love a chance. She gets a job offer from Dubai and she deletes the mail as she doesn't want to be away from Veer.
However, this is when Raj drops the bomb. He reveals to Zoe that Raghu breaks up with Leena as he turns into a playboy. This and her mother's (Simone Singh) constant reminder that she shouldn't sacrifice career for love gives her a jolt. What happens next forms the rest of the film.