Perci Trachtenberg (Ben Kingsley), widely regarded as the world's greatest living mathematician, meets Venkat Subramaniam (Amitabh Bachchan), a reclusive math genius from India, who has cracked a theory that could redefine the principles of probability and randomness. Aware that he is on the precipice of an extraordinary discovery, one that could find applications across various sciences, Venkat is encouraged to test his theory in the real world. But what starts out as an experiment between a charismatic young professor and an eccentric older one soon descends into a game neither of them can control.
Convinced that Venkat's discovery has the originality and significance to change the narrative arc of mathematics, Perci understands that Venkat's theory, in essence, questions the idea of what is random and what is fated. A surprising and deeply moving redemption, initiated by Perci, closes this stupendously modern film that is as much about the private equations of honour and chance, as it is about knowledge that can change the world.