In the heart of cosmopolitan Mumbai, resides business tycoon Mr. Verma (Kabir Bedi) whose pride and joy lie in the happiness of his two daughters who he has single-handedly brought up with utmost care and protection ever since their mother died many years earlier. Though his love towards both remains undivided, he is overprotective of his elder daughter Ayesha (Sameera Reddy) due to her shy and innocent nature.

Ayesha is exposed to the fast-paced Mumbai life on her first day of college where she meets Ajay (Sohail Khan), an orphaned student studying in the same college. The college is the today generation kind of college, which sees healthy rivalry in the form of various groups all of which vie to be recognized as the top group of the college. However, it is Ajay's group, the ARYANS, who are considered as the most popular group having been entrusted with the important task of handling the security of the college, protecting it from negative outside influences and drug peddlers.

Ajay forms a friendship with Ayesha and in many ways, helps her to fit in with the Mumbai college life. It is this selfless and helpful quality in Ajay that draws Ayesha towards him. And in her simple beauty, compassion and humane values, Ajay rediscovers love and hope.

Ajay and Ayesha's fondness for each other comes under the watchful eye of Chopra (Dalip Tahil), a conniving business associate of Verma, who wants to get his son married to Ayesha thereby furthering his business prospects and stature in the business community. Chopra takes no time in cautioning Verma and paints a very poor and negative picture of Ajay. Verma gets convinced further when at a function he unknowingly gets into an alteraction with Ajay both unaware of each other's identity.

The dark side of Mumbai is unleashed when Chopra, without Verma's knowledge, calls upon the widely notorious Bhaijaan, to rough Ajay up and thereby warn him to keep away from Ayesha. Bhaijaan, who is given the wrong impression of Ajay heads to the college to supervise his henchmen but is mistakenly hit by Ajay. This enangers Bhaijaan but due to the commencement of Ramzan month, during which he is to abstain from violence, is unable to retaliate. Now Bhaijaan takes the task of setting Ajay straight, upon himself but can do so only after Chand Mubarak, which marks the end of the Ramzan period.

Not wanting to waste more time, Chopra takes advantage of the Ramzan month and instigates Bhaijaan's ambitious henchmen Chotte (Sarfaraz Khan) and Munna (Rajpal Yadav) to take immediate action promising him enormous wealth which would help in realizing his secret desire to overthrow Bhaijaan. As a result, without Bhaijaan's knowledge, Ajay is mercilessly and brutally roughed up and thrown out of the city limits, warned to stay away from Verma's daughter. With the strong belief that Verma is instrumental in getting him beaten up and consumed with anger yet his unconditional love for Ayesha, Ajay challenges Verma that he will get married to Ayesha in 24 hours.

Verma gets taken aback and promises that he will use all his power, even at the cost of losing his empire, to prevent Ajay from even coming close to his daughter. Also, blinded by his self-respect and dignity, he decides to get his daughter married within the next 24 hours to Chopra's son.

Now Ajay, unarmed yet determined, is left with 24 crucial hours to win over the only woman he has ever loved but is prepared to overcome any hurdle placed by Verma or Chopra. But now, oblivious to Ajay, the month of Ramzan is over and Bhaijaan's first instinct is to kill the boy who dared to hit him in the college campus.

In the crucial 24 hours, does Ajay prove successful in standing up to Chopra' s negative forces?

What happens when, at the end of the Ramzan period, Bhaijaan finds Ajay?

Does Ajay prove successful in his challenge with Verma and safely finding his way in time to Ayesha's wedding with Chopra's son?

The heart-warming and power-packed entertainer, Maine Dil Tujhko Diya, answers them all and promises much more...