The adventure of a rebellious child, running away from his house to an island called Madol Duwa.

The film is based on Martin Wickramasinghe's iconic novel. Young Upali Giniwella is resentful of his new stepmother and lashes out by committing harmless acts of mischief around the village. He is sent to a boarding school where he bonds with the headmaster. He once again gets into trouble and is returned home when a new headmaster is installed. Upali is punished by his father back home. He becomes more resentful and takes off with his servant boy Jinna to the island dubbed Madol Duwa. After some adventures there Upali is found by a friend of his father. Upali learns that his father is sick and returns home to ask for forgiveness.