It all starts when Mrinmoy Ghosh (Kaushik Sen), the powerful head police officer in Hatimara, Jalpaiguri, known for hunting down Naxal insurgents in his area, is found dead at his residence. Arghya Sen (Prosenjit), a charming middle-aged bachelor, who takes Mrinmoy's son Amartya's art classes, visits their house when the mystery unfolds. On his arrival, he learns that not only has Mrinmoy been killed, but Kaberi Bhattacharya (Srabanti), Mrinmoy's beautiful sister, is also missing! Will the new officer-in-charge, Pritam Singh (Indraneil), be able to help Arghya and Mrinmoy's family track down Kaberi, and decode the clues behind Mrinmoy's murder, in the midst of a politically tumultuous era? Or will the drunk and irresponsible detective Gokul Debnath (Kaushik Ganguly) derail the investigations, and bring unforeseen truths to light?

After Suman suffers an accident, the two women in his life - Meghna, the wife, and Shubhra, the ex-wife - are compelled to meet each other. Ardhangini revolves around the awkward emotional duel between the two wives - past and present - in a time of personal crisis.

The Indian Bengali film tells us a story about the life of a young doctor who stood against the social superstitions prevalent in the rural areas and is hell bent on bringing in a sea of changes among the villagers.

While shooting a documentary on true love, Pramit learns of a mysterious village named Mohini where anyone who enters will fall in love. He and his camerman decide to seek out this strange place.