Summer vacation has just begun and Rick and Scotty plan to get jobs at the new Sea Mine Plant in Crayville. But plans are not going so smoothly at the new plant. After several coincidental accidents the boys begin to wonder if it could be sabotage? Doug Chambers' new processes for mining minerals from sea water are extremely valuable. Tom Blakely tries to work the books on a shoestring budget that gets thinner with every accident. What about the guy with the peculiar white face who avoids the two boys like the plague? Why doesn't Cunner Stoles want the plant in Crayville? Will the plant ever open? Join Rick and Scotty as they meet new friends and old enemies in this exciting adventure.