Five-year-old Krishna Mehra, son of Rohit and Nisha Mehra, undergoes an intelligence quotient test by a professor, who suspects that he has superpowers, due to Krishna answering all the questions flawlessly. His grandmother Sonia (Rekha) takes the young Krishna to a remote mountain village to conceal his unique abilities. Years later, Krishna (Hrithik Roshan) meets Priya (Priyanka Chopra) and her friend Honey (Manini Mishra) when Krishna’s friend Bahadur (Hemant Pandey) takes the girls’ camping crew near his home to camp. Krishna saves Priya from a hang glider accident and falls in love with her when spending time with her.
After returning home to Singapore, Priya and Honey are fired by their boss (Archana Puran Singh) for taking a non-permitted extension of 5-days in their vacation. In order to keep their jobs, Honey suggests her boss making a television program about Krishna. Aware of Krishna’s love towards her, Priya calls him to join her in Singapore to ask her mother permission to marry her. Krishna’s grandmother objects to this, saying that people will want to take advantage of his abilities. She then explains that his father Rohit was hired by Dr. Siddhant Arya (Naseeruddin Shah) to design a computer that could see the future in order to prevent wars and help prepare against natural disasters.

After defeating the villainous Dr. Siddhant Arya, and bringing his father Rohit back from the dead, Krrish continued fighting against evil and saving innocent lives. Now Krishna is living a happily married life with Priya, while Rohit is using his scientific brilliance to benefit society. And Krrish is everyone’s favorite superhero saviour. Unknown to them, a dark force is growing in another part of the world. Kaal, an evil genius, is selfishly misusing his powers to spread fear, death and destruction. And he is being assisted by an army of very dangerous beings, which he has created himself. Not long after Kaal’s plans are put into action, both Rohit and Krrish find themselves faced with a crisis of epic proportions, which only they can resolve, together. But when they finally cross paths with Kaal and his army, neither of them is prepared for what lies ahead. Kaal not only brings the world to the brink of disaster, he also puts the strength and love of Krishna and his family to the …

Singapore-based Dr. Siddhant Arya recruits a superhumanly powerful Indian-born man named Rohit Mehra, who was given special powers by a blue-skinned alien named Jadoo, to build a computer that can forecast the future, which results in an accident that kills Rohit. When this news reaches Rohit’s mother, Sonia, in India, she passes this on to Rohit’s wife, Nisha, who has just given birth to a son named Krishna. However, Nisha, unable to handle this devastating news, passes away, leaving Krishna to be brought up by Sonia. When Krishna is enrolled in school, she notices that he has the same intellectual and physical powers that his father possessed, so in order to shield him from any harm, she moves to a secluded and remote area in a mountainous region of the country, where he grows up. Years later, Krishna has matured, has acquired the same special powers that his father had, and is also able to communicate with animals. He meets with a camper named Priya and is attracted to her.