Blue, Barry, and Pancakes are best friends! They love roller hooping, free ice cream, and going on big adventures! One day, Barry and Pancakes want to go to the beach. But when they go to grab Blue, he's nowhere to be found. It turns out he left to search for a legendary stone buried deep underground, and didn't invite his best friends to join him! Feeling hurt, Barry and Pancakes decide that they're going to beat Blue to the treasure, but they are totally unprepared for the danger that awaits them in the cave of the Jelly Gem!