'Heroine' showcases the life of a superstar diva - revealing the unseen facets of celluloid stardom. Mahi Arora (Kareena Kapoor) is a star at the top of her game. But while she keeps up with the demands of stardom, it is her involvement with a much-married superstar Aryan Khanna (Arjun Rampal) that makes her career take a nosedive. As her love life shatters, Mahi's professional engagements start to suffer as well. Her impulsive and moody behaviour results in her losing movies to upcoming actresses and the brand endorsements start to fall apart as well. Divya Dutta plays the role of a no-nonsense PR person who Mahi teams up with to resurrect her image and her career. Mahi tries to salvage her failing stardom but each move seems to bring its own strange complications – the journey is lonely and even when she falls in love with cricketer Angad Paul (Randeep Hooda), the relationship hits rock-bottom pushing Mahi further into depression and desperation.