The storyline of the film revolves around a father and son’s relationship. Shekhar Subramaniam (Shahrukh Khan), a geeky gaming expert, wants to be a super hero for his son Prateek (Armaan Verma). But his young son, like all kids, thinks super villains are more cool. In an effort to impress his son, Shekhar designs a game which changes their lives. He creates the ultimate clash of good against evil by pitting a very powerful anti-hero "Ra.One" against a seemingly less potent good guy "G-One".