"Sardar Udham" is a biographical film that tells the story of Udham Singh, an Indian revolutionary known for avenging the 1919 Jallianwala Bagh massacre. The film, directed by Shoojit Sircar, explores Singh's life, his struggles, and his quest for justice against the British colonial rule in India. The narrative follows Singh's journey from India to England, where he ultimately assassinated Michael O'Dwyer, the former Lieutenant Governor of Punjab, in 1940. The film highlights themes of patriotism, sacrifice, and the impact of colonial oppression on Indian society.