Anjali (Kareena Kapoor) is the younger daughter of her Canadian mother (Nafisa Ali) and her Indian father (Kabir Bedi) living in the city of Montreal, Quebec. She shares a hale and hearty relationship with her parents but has a secret to hide. And she reveals this secret only to her elder sister Aarti (Sushmita Sen).

The secret is her love for a budding musician Raja (Akshay Kumar). Raja is not a rich man but that does not deter Anjali from loving him. Aarti assures Anjali and Raja that she will convince her parents of their true love.

But unfortunately fate has different plans for them. Aarti passes away on the birth of her twin babies. Circumstances force Anjali to marry Aarti's husband, Aditya Sahai (Anil Kapoor). With the much older and mature Aditya Sahai, Anjali migrates to New Delhi.

Aditya is a business tycoon who hardly finds any time for his sister-in-law turned wife Anjali or his two lovable daughters from Aarti. Anjali fulfills every role asked for her by the society but cannot bridge the gap between herself and Aditya. She finds herself in a marriage that has no compatibility but only compromise. Her only source of solace are her two endearing nieces.

Amidst all this, one fine day Raja who is now a famous fusion singer walks back into her life. Suddenly Anjali is torn. She begins hanging out with Raja. When Aditya returns, he follows her everywhere she goes and hires two private investigators to watch her. Finally, Aditya gives Anjali the choice between Raja and him. She choses Aditya for the well-being of her nieces. Raja leaves and Anjali leaves on a tour with her husband.

The soundtrack of the movie was composed by Nadeem Saifi and Shravan Rathod, with the lyrics authored by Sameer, using the voices of Ghulam Ali, Kumar Sanu, Abhijeet Bhattacharya, Udit Narayan, Sonu Niigam, Alka Yagnik, Lata Mangeshkar, Asha Bhosle, Sapna Mukherjee, Shantanu Mukherjee(aka Shaan). The song Mera Dil was recorded in voices of Udit Narayan, Sonu, Shaan although the respective have dissimiliar lyrics and depict different emotions.

The film did not do as well as expected despite a huge star cast. Bewafaa was given a below average status

The film got average reviews, with the performances getting especially mixed notices.