Kaira (Alia Bhatt), a young professional cinematographer lives in Mumbai on her own and leads a regular on-the-go life, chasing her dreams. She has great set of close friends on whom she relies completely for her emotional support as her family life seems troubled. But, her love life is a mess. Kaira works with Raghuvendra (Kunal Kapoor) who is a producer of several of her projects. Raghu likes Kaira and wants a serious relationship but Kaira seems to care less. After a sudden breakup with Raghu, she moves back to her parents' house in Goa.
Her life takes a 360 degree turn when she decides to meet 'BD' (Brain ka Doctor) Dr. Jahangir Khan (Shah Rukh Khan). Then begins Kaira's therapy sessions with Dr. Jug who has a very friendly and unique approach to unwind his patients.