Emma, Rick, and Lee live in a community on an island south of the equator. their main love in life is to scuba dive. Emma's dad is a scuba diving instructor and has taken the trio out to dive on one of many pirate ships scattered about in the shallow waters surrounding Flagstaff Island. A strange map leads the three fun-loving trios to another island and to a chest full of gold, jewelry, and three handwritten books, hundreds of years old. Even before they can get the chest onto their boat they have trouble. once its back in the boatshed they have more trouble, this time from the Mayor of the community. However, he underestimates the trios resourcefulness and tenacity to stop him taking the island's treasure.