Cam Walker and friends (aka The Outriders) live on Surf Island, on the wrong side of the tracks. They're a varied group, to say the least, but they have a few key things in common: first, they HATE the idea of being bored. Second, when they set their minds to something, they DO it. What they've set their minds on now is Expedition Blue Cave. The cave in question only glows blue once every seven years, and they're determined to see it while they can. But to carry out the expedition, they've got to 1) free Outriders team member Shelby from summer school hell; 2) 'scavenge' (not steal - there's a difference) all the equipment they'll need to travel to Blue Cave (like jet skis...) and 3) be home by 7 o'clock so their parents don't miss them. The Outriders have their expedition plan all worked out - what they didn't bargain for was finding robbers at Blue Cave, hiding their hoard from a recent theft...Suddenly the expedition gets a whole lot more exciting!