Kit and the Triple Trouble team are headed to the underwater world of The Orb in the third installment of the high-stakes Dungeon Runners series. Dungeon Runners Kit, Sandy, and Thorn travel by dragon to the city of Saltport to compete in a dungeon run deep under the water in The Orb. There they must solve puzzles, escape traps, and battle a dreadful Narghoul. As the smallest and most inexperienced team of the Bottom Feeders League they are at a disadvantage, and worse yet, they start to suspect one of the other teams may be cheating. The three must remember what's important and work together, using all their skill, strength, and smarts, if they are to survive their most challenging dungeon yet.