Sayahnam is one of the most talked-about Drama movies released in 2000, attracting audiences with its cinematic storytelling and memorable performances.
An old man K.K. Madhavan noted for his thinking and stance on social issues is proud of his scientist son Siddharthan but upset about the country's involvement in nuclear tests. He continues his crusade against nuclear weapons but together with his loyal wife Bharathi finds himself increasingly isolated as his own son, his party and the country celebrate the nuclear advances made in India.