On the Great Rumble Hunt, Chalotte, a Borrible from Whitechapel, very nearly lost her life—and good friends had been left for dead—all because of the Rumble Treasure Chest. To Chalotte the treasure was evil and she had sworn never to go on another adventure. But when Chalotte and the other survivors discover that Sam the horse is in danger they know they have no choice—Borribles always help their friends. Their attempts to rescue Sam lead them into the second Great Borrible Adventure!