One (2017 film)

Ranajay and his friends are trainee policemen who are also self-appointed vigilantes at night. Aditya Sen, an exceptionally cunning and prodigious scientist, owns and runs a pharmaceutical empire. The national mafia and contract killer work on Aditya's word. Ranajay, with his sharp thinking and instincts, is suspicious of Aditya over several seemingly unconnected criminal events and secretly carries out an unofficial investigation. Trouble mounts when Aditya becomes suspicious of his intentions and murders Ronojoy's friend Abhijeet, an honest policeman. Later, Ranajay learns that Aditya can detect all his plans via satellite communications, and he misdirects Aditya into killing Vicky. Ranajay later collected all the pieces of evidence against Aditya and completely shattered him. At last, it is shown that Aditya died because of a gunshot from his girlfriend, and he handed over all the secret information against the ministers, which would be helpful as evidence/proofs in the future.

• Yash Dasgupta as Ranajay Bose IPS^[5]
• Prosenjit Chatterjee as Aditya Sen, the main antagonist^[6]
• Nusrat Jahan as Megha^[7]
• Supriyo Dutta as MLA-turned Minister Gobardhan Sen, Aditya's father
• Rajat Ganguly as Chief Minister
• Bharat Kaul as leader of the dock syndicate, Damodar Pandey
• Arjun Chakrabarty as Abhijeet IPS
• Rajib Bose
• Abhishek Bose
• Anil Kuriakose as Kamlesh Tripathi, Coal mafia
• Rachel White as Bipasha, Aditya's girlfriend
• Aryann Roy as Vicky
• Debdoot Ghosh as Ashok Ganguly, Pharmaceutical industry head
• Bulbuli Panja
• Satyam Bhattacharya
• Frederico Machado Freitas
• Krishnendu Adhikari^[8]

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