The film is a Bengali thriller comedy based on Tagore's story of the same name. Set during the time of the British Raj, the backdrop for the story is the partition of Bengal in 1905. The film revolves around Mahimchandra, a detective with the Bengal police. His obsession with western detective novels and crimes makes him think that his job is too boring. Mahimchandra searches for the perfect crime with a complex motive that will make his profession somewhat exciting. Filled with hilarious dialogues and comic deductions of Mahimchandra, the film progresses with the growing political turmoil of the Swadeshi movement. As Mahimchandra continues his search for the perfect criminal, his obsession starts to affect his career and personal life.