Hanuman, while building a causeway, discovered that mermaids underwater were destroying his work. Hanuman is the famous Monkey King of Hindu mythology, the son of the god Shiva. When Queen Sita WAs kidnapped her husband enlists Hanuman's aid in rescuing her.
Hanuman learns that Sita is being held captive on the island of Sri Lanka. He informs King Rama, her husband, who orders him to build a causeway to Sri Lanka from India so Rama's army can attack. Hanuman collects his band of monkeys and they begin throwing huge boulders into the sea to make a foundation for the causeway.
After a few days the monkeys notice something is wrong and call Hanuman to report. They tell him that each day they throw rocks into the sea and the next day they are gone!
Hanuman asks for volunteers to join him while he instructs the other monkeys to continue throwing rocks into the sea. When several volunteers have stepped forward Hanuman leads them into the waves. They find a large number of mermaids underwater. As they watch, a new rock is tossed in. The mermaids underwater take the rock and carry it away!
Angrily, Hanuman looks for their leader. He spots an especially lovely mermaid supervising the others. He swims towards her but she skillfully evades him. Time and again he begins an attack but it comes to nothing.
Maybe it starts as respect for the mermaid's abilities, maybe it is the result of her beauty, in either case Hanuman finds he is falling in love with the creature. He changes he tactics and begins to silently woo her. She responds to him and soon they are together at the bottom of the sea.
Later, Hanuman asks the mermaid why she is stealing the rocks. She tells him that she is Sovann Matcha, a daughter of Ravana (the demon who had abducted Sita). When Ravana saw Hanuman's monkeys building a causeway he instructed Sovann Matcha to stop it.
Hanuman tells the mermaid why he is building the causeway. He tells her of the abduction of Queen Sita. The battle between Rama and her father Ravana. He tells her how is he had defied Rama's orders before, and in consequence was ordered to finish the causeway within seven days or pay with his life.
Sovann Matcha turned to Hanuman and her eyes were filled with love. No more, she said, would she prevent Hanuman from completing his mission. Her mermaids underwater would, in fact, return all the stolen rocks to the causeway.
They parted as lovers part but it was not to be the end for them. Hanuman had left a seed with Sovann Matcha and soon she would give birth.