Directed by Rạjkumar Hirani, is a story about three close friends who study together at the Royal Academy of Mechanical Engineering (ICE). They have different backgrounds, personalities, and interests. Rancho (Aamir Khan) is a generous, intelligent, and sometimes very reckless guy. Farhan (R. Madhavan), who is also the storyteller in the film, has a dream to become a wildlife photographer, but because of his family's wish, he entered the Academy of Mechanical Engineering. Raju (Sharman Joshi) has a passion to become an engineer, but in addition to his personal hobby, he also has to study with the pressure to revive the family economy with a retired teacher mother, bedridden father, and sister in law. because there is no dowry money. Becoming friends, the three of them worked together through many difficulties and pressures in college. With her personality, Rancho has a great influence on two friends, helping them to let go of their fears, live true to themselves, and overcome all difficulties pursuing their passion. The lifestyles of the three guys have touched the educational method of the principal Viru Sahastrabuddhe (Boman Irani) (often called Virus by the students), causing him aversion and many times making it difficult to study. of three people. Ironically Rancho has a crush on the principal's daughter, medical student Pia Sahastrabuddhe (Kareena Kapoor). Showing her true love and humanity, Rancho also makes Pia fall in love with her. In addition to the principal, there is also someone who hates Rancho equally, Chatur Ramalingam (nicknamed The Silent One because he only dives his head to learn rice, takes medicine from a quack, and makes no noise) because Rancho has several times. He teased Chatur about his schooling habits and always made Chatur only second in his class in terms of academic achievement. After being turned into a fool in front of the school once by Rancho and the education minister, Chatur made a vow ten years later to meet Rancho again to see who's more successful.

A few weeks before the graduation exam, an incident happened. In a drunken stupor, Farhan, Raju, and Rancho went to Virus's house and urinated up to his door causing him to anger and expel Raju unless Raju denounced Rancho about the day before. Not wanting to betray Rancho or disappoint his family, while Virus was napping, Raju jumped upstairs to commit suicide, but he was lucky to be saved. After that, Raju went to job interviews and was successful, and Farhan went on to persuade his family to pursue photography. When the news of Raju's success in the job interview reached Virus's, he was very angry and announced before Pia that he would be the one who gave the test to fail Raju. Pia immediately stole the key to Virus's office and gave it to Rancho so that he could steal the set of Virus papers and give it to Raju. On a stormy night, Rancho and Farhan begin to act but are unfortunately detected by Virus and expelled all three of them. While they were wrapping their bags home, they met Mona (Pia's sister) who was suffering from labor but was unable to reach the hospital due to a storm. Over the phone, Pia tells them to bring Mona into the common room and follow Pia's instructions to help Mona give birth. While there was a power outage during the work, Rancho immediately sent out the Viruses generator, generating a power source so he could continue. Finally, the baby was born. The virus was deeply touched and admired by Rancho's mastery, and forgave all three of them, allowing them to take their graduation exams.

After the graduation ceremony, Rancho disappeared suddenly and has since disappeared from no sound. Suddenly one day, Chatur called to summon Farhan and Raju to their old school on the same day that Chatur had made an oath ten years ago. Rancho did not come, but Chatur had previously obtained information about Rancho's address. Chatur wants to show off his success to Rancho and Farhan and Raju want to meet old friends, so the three of them go together to find Rancho. During the trip, they gradually revealed the mystery behind their friend's identity. Also during the trip, Farhan and Raju tied Chatur up, robbed her car, and made Pia give up her wedding to join her quest to find Rancho. At the address Chatur found, they met Rancho, an unknown man (Jaaved Jaffrey). Asked if they knew that the friend who studied with them was an eager orphan, who used to be a servant in the house, and Rancho himself really didn't like to study, so the family gave the boy a servant to take the master's name to go to school. . After graduating, while the master received his degree, their friend became a teacher in Ladakh.

Raju and Farhan took Pia, with Chatur restrained in the car, to Ladakh. At a children's school, they reunite many of their friends' inventions. Three best friends meet again. Rancho reaches Pia. When asked about his real identity, Rancho said he was Phunsukh Wangdu, a wealthy business partner, inventor with hundreds of patents that Chatur hopes to cooperate with. When he learned of Rancho's real name, Chatur panicked, pleading with Phunsukh not to cut cooperation with him and conceded in the traditional way of the dormitory they used to stay.