The episode of Naagin 3 begins with the doctor increasing the vibrations of the machines. Arvind enters the house in the form of a house help and drops plates on Anu's head. The doctor runs to her leaving Bela alone hearing Anu scream. Bela switches the machines off and sees that her time for completing her first task is almost about to end. Mahir sits thinking about Bela.
Mahir brings comic books and toys and says that he loved them. Mahir says that he tried to forget whatever wrong was happening between his parents.
Bela says that if Yuvi had to come back, he would have. Mahir promises to take the child's responsibilities. Bela tries to say that she is not pregnant, but in vain. Bela suddenly remembers that the NagPandit wants Bela to find the way to the nagman. Ajithab and Ramona reach the cave and they get inside and searching for the body. Ajithab spots the shadow of Arvind and stumbles on something and falls and soon the cave begins shaking.
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A body falls from the ceiling and Ajithab spots it. Mahir is worried about Bela's behavior, and Sumitra says that it's just hormonal changes. Bela walks out and finds the nagpandit who hands her the second job which is to find a birthmark on Mahir's body. Bela walks into Sumitra's room and finds information about a birthmark on Mahir's body.
Sumitra tells her that there is indeed a birthmark on Mahir's back. Ajithab says that the body has gone for an autopsy. Vish is furious at Anu for creating problems. Bela returns to her room and finds that Mahir has decorated the place for her. Bela purposely drops juice on Mahir's shirt and forces him to remove it. She later spots the birthmark.
Nagpandit comes into the room and Bela distracts Mahir and sends him away. Nagpandit says that Mahir now she needs to prove that he indeed loves Bela. Vish tells Ajitabh that Bela was brought up in Haridwar. Bela is disturbed about killing Mahir and decides she needs to think about the nagmani. Bela is walking down when Sumitra introduces doctor Pavitra to Bela and says that she can tell her about the pregnancy. Bela worries for her own safety from the doctor.
