Keiko, Kenzo and Eji are in the bustling city of Singapore to attedn their cousin sister, Kiara's recital on an Ancient Sea Trade. Keiko and Kiara discover a hidden treasure note in an ancient urn. Their inquisitive nature leads them into a treasure hunt. Soon they realise some evil treasure hunters are out to get them. Find out what happens when they race to hunt the sunken treasure under the South China Sea.