Naagin 3 starts with Bela (Surbhi Jyoti) coming to Jamini’s (Mahira Sharma) and telling her that she will not let her harm Vish (Anita Hassanandani). She says she will not spare her. Jamini says let us fight it out as I will snatch away Vish and your powers. Sumitra (Rakshanda Khan) comes to call them downstairs and Bela says she will bring Jamini down. Rehaan/Vish sits nervously in the mandap. Bela taunts Jamini on her powers. Maahir (Pearl V Puri) asks Rehaan if he does not intend running away from the mandap. Sumitra wonders why Jamini is not coming. Mukti Bhabhi goes to see and just finds a dupatta. They wonder what happened to the girls. Bela in her Naagin form twists Jamini and brings her to the forest. Jamini falls down. Bela tells her I told you not to mess with Vish or me. She says I will not spare you. Jamini says I have brought you here so that I can challenge you alone. She says I will finish you. Jamini says I want to offer you as sacrifice to Goddess Kankaali. Bela is furious and says how can you imagine doing that to me.

Jamini through her powers makes Bela weak. She cannot concentrate to bring out her supernatural strength. In the bungalow, Andy Sehgal (Chetan Hansraj) gets irriated. Poulomi (Pavitra Punia) thinks that someone has cast an evil eye on the house. Jamini brings Bela to an old temple for sacrifice. Vish is also looking for Bela. Maahir calls Bela but is unable to reach her. Vish is worried for her friend. Suhani tells Pratham she is damn tensed. Maahir blasts the Inspector for being so callous.

He leaves the house looking for Bela. Vish comes to the Shiv Temple and prays for help. Jamini tells Bela she escaped first time round but this time, she cannot escape the sacrifice. She takes a sword and is about to kill Bela. In minutes, she changes into a snake and challenges Jamini. She tells Bela that she wants to kill her and become immortal. Bela says Lord Shiva is the owner of the Naagmani and she cannot take it. Jamini makes one more attempt but Bela has regained all her powers. She says I do not want powers but I want to finish sinners like you. Jamini tells Bela that she has lost her heart to a human being. She taunts her that she has forgotten her motive for revenge. Jamini tells Bela that she is in love with Maahir.

Jamini engages Bela in a conversation and hits her tail with the knife. She cries out in pain. Vish finally sees that Bela is in the cave. Maahir comes to the temple looking for her. Vish turns into a snake and escapes. He calls home and says there is no sight of Bela. Kuku says even Rehaan is not here. Maahir prays to Lord Shiva and leaves. Jamini attacks Bela with her claws. Bela throws her to the ground and assumes form of Sheshnaag. She kills Jamini. Vish also reaches there and they hug. Maahir comes to the temple and sees Rehaan/Vish with Bela. Rehaan/Vish tell Maahir that Jamini was a con woman and was escaping with the jewellery. He says Bela prevented her. He consoles Maahir saying that they are just friends and he need not worry. Maahir scolds Bela saying why did she take so much risk. Rehaan says Bela is misunderstood and says he needs a break now. Maahir wipes the blood from Bela’s forehead. He says thank God you’re safe. Bela remembers Jamini’s words that he has feelings for her. At home, Poulomi annoys Andy while Sumitra makes Bela promise that she will never risk her life again. Sumitra tells Andy that she will leave the house and take her kids along with her. She requests Andy but he does not relent.

Maahir says we can leave this house, it is no big deal. Andy says think about business. Maahir says love is bigger than everything. Maahir says his mom if she is happy or not. Anu comes to the Inspector and tells him to take her to Raavi. She requests the inspector and tells him to take her to Raavi. He relents. Vish as Rehaan calls his mom and says he is going to New York. Vish breathes easy post that.