Vishwaroopam: Vishwanathan, a Kathak dance teacher in New York, is happy in his marriage with Nirupama, a nuclear oncologist who married him to pursue higher studies in the USA. Deciding to cut ties with her husband, Nirupama hires a private detective to monitor his activities. To her utter shock, certain truths about her husband are subsequently revealed, setting off a chain of events that will change both of their lives irreversibly.