The villagers are warned not to venture out till the day of Naga Pournami at night by the village head. Bhavani and her friends come home. She lies to her grandmother that she lost the amulet.
Sunanda and Panicker argue about opening the temple gates to the public. Arjun finds the ‘Nagaraksha’ amulet that Bhavani loses. A villager gets ready to take Bhavani to Nagapuram.
Gurudevan summons Kalakeyan. Kalakeyan sets out to know the truth behind the temple. The devotees perform ‘Mahadeva Puja’. Nagadevatha attacks Kalkeyan and his people.
When Bhavani reaches home, her father questions her. Bhavani's grandmother offers prayers to Lord Mahadeva. Malli, who regains consciousness, shares her woes with Bhavani and her family.
Bhavani introduces her friends to her grandmother, who feeds her. She sees her older brother's photo and thinks about him. Bhavani fights with her grandmother for scolding her.
The passwords to the laptops fail to work as Arjun and Bhavani’s devices get exchanged. Bhavani hides the fact that she lost the amulet from Annapoorna. Bhavani goes to the temple with Annapoorna.
Nagadevatha drinks the milk offered by Bhavani. Arjun’s mother briefs him about the amulet. Bhavani hides the fact that she lost her amulet from her family. Sanvi scolds Arjun for losing the laptop.
Bhavani gives Brahmaraj money to get a duplicate ‘Ashtanaga’ amulet made. The village head punishes Shekhar for breaking the village norm. Arjun goes to Nagapuram on the night of Pournami.
Nagadevatha stops Arjun from going to Nagapuram and seeks to know why he wants to go there. Later, Krishnanathan shelters Arjun who reaches to exchange his laptop with Bhavani’s.
Nagini goes to Brahmaraj, who initiates the task of making a duplicate ‘Ashtanaga’ amulet and kills him. Guruvaryan’s disciple tells him what he saw. Arjun dreams about Bhavani.
Nagini, who crosses paths with Arjun in the forest, warns him. Bhavani offers the water she brought from the river for Annapoorna’s puja. She panics when she learns about Brahmaraj’s death.
Krishnanathan informs Arjun about the priest’s advise to stay indoors for 5 days of ‘Pournami’. Annapoorna corrects Arjun, who pays no heed to it. Sanvi has a nightmare about being bitten by a snake.
Annapoorna suspects Arjun and Bhavani. She confronts Bhavani about the amulet. Veerabhadran gives Bhavani the duplicate amulet. Arjun reaches the temple.
Arjun meets a hermit at the temple and offers milk at the snake hill. Bhavani hands over the milk meant for the offering to Mallika. Arjun spots Bhavani and her friends going out at night.
Bhavani and her friends reach the temple where they are chased by dogs. The hermit forbids Arjun from entering the temple. Arjun goes to the sorcerer, whom he later scorns.
Bhavani hides in Arjun’s room when Krishnanathan wakes up. Arjun lies to Krishnanathan. The amulet tied to Arjun's hand falls off. Later, Arjun's mother has a dream.
Arjun gets the amulet from Bhavani’s room. The sorcerer tells Veerabhadran about Arjun. Annapoorna briefs Bhavani about the benefits of the ‘Ashta Naga’ amulet. Arjun calls up his mother.
Arjun is in a dilemma over Veerabhadran’s words. Sunanda prepares to take revenge upon Krishnanathan. Malli asks Bhavani about Arjun. Arjun ignores the sorcerer, who visits him.
While Bhavani finds the amulet placed by Arjun on the snake hill, Arjun finds Bhavani's lost amulet. Veerabhadran gets a strand of Bhavani’s hair. Malli tells Bhavani about the ‘Naga Pournami’ day.
Bhavani panics when Malli questions her. She places a video camera at the temple on the day of ‘Naga Pournami’. Arjun shows the temple to his mother via video call. Nagadevan and Arjun enter a tiff.
The devotees pray to the divine light from the temple. The sorcerer, who uses Bhavani’s hair strand and brings her to his place, entrusts her with a task. Arjun follows her.
Arjun rescues Bhavani from the sorcerer. Krishnanathan hits Bhavani without knowing the truth. Nagini speaks to Nagadevan for Bhavani. Krishnanathan stops Arjun, who comes to tell them the truth.
Arjun bids goodbye to Bhavani's family and returns home. Bhavani stops Arjun from telling them what happened the previous night. Arjun hands his mother the soil from the snake hill that Annapoorna gave him.
Sunanda briefs Krishnanathan about the duties of a village head and criticises him. Bhavani corrects him when he accepts the punishment. Arjun thinks about Bhavani while the latter walks on live coal.