Phra Aphai Mani and his brother, Sisuwan were princes who were sent to study by their father as he hoped they could use the knowledge gained to rule the country,they were walking in the forest while talking about what subjects they would study, what kinds of people they might make friends with and how hard their lives without servants would be. Then they got lost in the woods.
after the long years of study, Phra Aphai Mani came back with the knowledge of playing the pipe and his brother at sword-fighting. Their father was not pleased about his sous and blamed them alot.
The pipe phra Aphai Mani had learned was a magic pipe. Its sound could put people to sleep and take the soul out of the body causing death. He played his pipe to kill the time because he was alond and lonely in the deep forest. He made the king of the spirit angry because his son died afthe hearing the pipe's sound
One day while Phra Aphai Mani was playing his pipe, the soldiers and his brother, Sisuwan fell asleep. A lady giant, who fell in love with the handsome Phra Aphai Mani and his pipe, took him away to her cave where she tansformed herself in to a beautiful woman.
Phra Aphai Mani had been living with the lady giant for a long time. He lived with her until she gave birth to a son, Sinsamut. Then Phra Aphai Mani found out that his wife was really the giant, Nang Phisua Samut, Then he made a secret plan to escape from the giant's cave with Sinsamut
While Phra Aphai Mani was swimming exhaustedly in the deep. sea with his son, Sinsamut. They frlt hungry, thirsty and frightened. Then he was helped by a beautiful mermaid. Finally he fell in love with her.
One day a ship went by the island. In the ship were the king Silarat of Phleuk and his daughter, Princess Suwannamail She felt sorry and tried to kill herself because she was engaged to marry an unknown man Prince Usaren of Lanka
Phra Apahi Mani met Prince Usaren,Suwannamali's fiancee' who came out looking for Suwannamali. He met Suwannamali and she refused to go with him him but Phra Aphai mani. Then there was a fight. Finally Usaren fled back to Lanka after the war.