While using her photographic memory to find her missing science fair project, Cam accidentally locates two valuable gold coins.

During a weekend trip to Ocracoke Island, siblings Judy and Stink Moody take part in a pirate treasure-hunting game, in which various clues lead them to silver coins, or "pieces of eight," hidden across the island.

Seven-year-old Tessa and ten-year-old Cammie, the first female president's daughters, investigate when gold is discovered on the White House grounds and Tessa's piggy bank goes missing.