Distraught, Ambi attempts suicide, almost drowning himself before having second thoughts.
Subsequently, he develops another personality named Remo, a fashion model.
Through recovered-memory therapy, the chief psychiatrist of the hospital uncovers Ambi's past.
It is revealed that, when Ambi was fourteen years old, he witnessed the accidental death of his younger sister Vidya due to civic apathy.
The plot centres on a disillusioned everyman whose frustration at what he sees as increasing social apathy and public negligence leads to a split personality that attempts to right the system.
He explains the rationale behind them and says that only when every Indian is responsible and sincere will the country prosper on a par with developed nations. Ambi is brutally interrogated and almost killed, triggering Anniyan's reappearance.
Ambi's personality alternates between Ambi and Anniyan, resulting in ambiguity.
Pre-production for Anniyan began in November 2003 and principal photography in March 2004.
The making of the film, which included numerous production delays, took 14 months.