They go on a mission to the dense forests surrounding the mountain ranges in search of the Thanka Sarpam or the Golden Snake, believed to be the most poisonous in the world.
Their intention is to conduct research based on its venom and perhaps invent an anti-venom that would be a remedy for all snake bites.
One day, Balan and the compounder reach Swami's hermitage and see the Thanka Sarpam on the idol of Nagamma inside the cave temple there.
Balan and his father request Swami to hand the Thanka Sarpam to them and offer a huge sum of money.
Kari Nagam or the Mountain Cobra believed to be the companion of the Thanka Sarpam reaches there and bites Swami.