Theme -Rohit Mehra Jr., aka Krrish, played by Hrithik Roshan, is a man with extraordinary strength, speed and intelligence. He loves the calmness and beauty of natural mountainous and surroundings where he is living. He comes across Priya (Priyanka Chopra), a beautiful girl from Singapore, who has come there for camping and trekking and falls in love with her. Rohit is left heart broken when she finally has to leave for Singapore. When Sonia, Krrish grandmother (Rekha) sees how lonely he has become, she encourages him to go to Singapore and woo Priya back.
Rohit, on reaching Singapore, finds it to be a completely new and fascinating world. He learns fast and adapts to it quickly. He makes new Chinese friends in Singapore and woos Priya. While trying to woo Priya in a circus, there is a short circuit and the tent of the circus catches fire. The circus performers get stranded on top and start screaming for help. Rohit realizes that he can help them. He sees a slightly broken burnt Mask lying on the ground nearby. He dons the mask for hiding his identity and save them in a spectacular manner. This heroic deed makes the Masked Man a hero, and a nationwide search is launched for this new hero in Singapore.