Brothers Josh and Eddie Boone join with their creature friends Henry, Kroggy, Skilt, and Junior to battle the evil Jimmy Roberts. Jimmy has one powerful opal now, but is attempting to capture Josh and Kroggy, take their opals, and unite the black opal power, which will allow him to conquer the Below and the Above. The brothers need to call on all their creature friends, including giants and a dragon, to stop Jimmy.