A door-to-door masseuse, Kaali finds her life turning upside down when her son, Sunny, meets with an accident and her husband, Tanmay, gets arrested for the murder of a drug dealer.

Kaali desperately seeks a way to arrange money for Sunny's operation. Her only way out is to sell the drugs that Tanmay had hidden in the house.

Kaali gives in to selling drugs for money and steals a consignment in her desperation to save Sunny. Special Branch Officer, Aniket Bose, smells something fishy after interrogating Tanmay.

Kaali tries to sell the stolen consignment while getting into a bad blood with the drug mafia. Her past lover, Officer Aniket Bose resurfaces in her life, through the ongoing police investigation involving her husband.

Kaali gets entangled in a web of violence and abuse while on the run from the drug mafia. Aniket's suspicion strengthens as he uncannily crosses paths with Kaali at odd places.

Kaali is tricked by her landlord into the hands of the drug mafia. She manages to fool them and seeks refuge from the police, not knowing their deep-rooted corruption

Despite Aniket's warnings, Kaali agrees to lead the police into the drug lord, Dilip's den. Kaali is dumbstruck when she learns of OC Mitra's true intentions.

Aniket takes Kaali into custody after a bloodbath with the drug mafia but lets her out one last time to pay for Sunny's operation. Amidst this, Kaali realises that Kolkata has been shackled by the international drug mafia.

While Kaali is kept in a witness protection facility, Sunny is recovering but still struggling with his semi-paralyzed condition. Under the supervision of Officer Gupta, Jinliang, a notorious criminal, is being deported to Vietnamese Authorities. The convoy gets attacked by armed assassins.

Akash kills all the police officers and takes Kaali and her son captive. Jinliang bargains his freedom in exchange for Kaali's life. Six months ago, when Kaali was caught by the police, Roop had taken Sunny away and was looking for his boss Dilip. Meanwhile, Swapan meets Sunny and Roop and acquires information about the drug deal.

Ambarish Mukherjee's body is discovered, and Mouni is arrested. Kaali and Dilip reach the dock and are surprised by who they see there. The police arrive at the scene and arrest Kaali, Dilip, and Jinliang. Amidst all this, Swapan escapes. Kaali is forced into the witness protection program by Sanatani.

Jinliang shoots Aniket and escapes. Sunny and Kaali too escape from the clutches of Akash. Gupta and Sanatani discover a shocking truth about Swapan. While escaping, Kaali and Sunny are kidnapped by Swapan’s goons, and Kaali and Aniket are sent with a bug to get the location of the consignment.

A flashback reveals the story behind Jinliang and Swapan’s feud. Kaali fails to get information about the consignment and is sent back to Karim, who works for Jinliang. When Kaali negotiates with Karim, Swapan’s men arrive, and a crossfire ensues. Kaali tries to rescue a group of children and Swapan raises his gun to shoot Kaali.

Swapan shoots one of his men and narrates the story of Dilip's betrayal. Meanwhile, Dilip escapes from jail and goes to Jinliang's den, where he is given a last chance to find Kaali. Gupta gets to know about Kaali and starts connecting the dots.

When Kaali reveals how big the consignment is, Swapan decides to give up and sets her free. Later, Gupta catches her red-handed while shooting Roop and blackmails Kaali to help her get to Swapan. Meanwhile, Akash tries to execute Satyaki, but it becomes impossible due to police protection.

Kaali meets Swapan and tells him that Gupta is trying to manipulate the situation. Akash attacks the hospital and injures Sanatani, but Aniket manages to kill him. Jinliang is ruthlessly killed by his higher official, Wallace. Amidst all the chaos, Swapan kills Dilip, and Kaali shoots Gupta. Swapan declares Kaali as the new queen of Kolkata’s underworld.

Cast: