Prasanth lives with his parents in Tiruchirappalli. In the summer, he always visits his grandparents in Nagathi, a river island in Thanjavur District. The river Vatar, bifurcates into two and merges again and forms this village. So, the village is ever green with mighty trees and beautiful landscapes. He always spends his vacation here, hanging out with his grandfather and his friends. His grandfather was a retired central government employee. So he has travelled to many parts of India. His knowledge always amuses him. Prasanth has just come to his grandparents, this news reaches his friends and they have to take him out for playing. The Grandfather is very concerned; he gives some instructions and tips for their safety.