It's the first day of the Mayana Kollai festival, but a factory fire causes panic; everyone rushes to put out the fire; as Sakkarai begins to investigate the cause of the fire, vital evidence emerges.

Shanmugam and her family members confront Regina and Vadivelu about their son, Adhisayam, being the suspected stalker; the confrontation takes place at Malar's house, where the air is tense.

Sakkarai and Nandini arrive just in time to clear up the misunderstanding; Nila and Adhisayam's families gather at Regina's home; they listen to voice messages on Adhisayam's phone from a folder titled "Nila."

The quarry lake is dark with only bundles of artificial light; Sakkarai looks shattered as he swims up to an entwined teenage couple, Adhisayam and Nila; Sakkarai sees Nila's backpack stuck in the tendrils and picks it up.

Shanmugam, Devi and Nandini discover Nila's hidden hobby; they are amazed by her work; there is some friction in Sakkarai's relationship with his betrothed; police search for clues near the lake.