Steve, Mark, Valerie and Barry become caught in a toy balloon and end up pulled by a strange force over a thousand miles across a violent ocean to a land ruled by a ruthless dictator named Titus. The despot, however, has no knowledge of the land across the ocean and thinks all the inhabitants are as small as the little people, but when Steve explains that giants live there as well, Titus demands he brings back proof of their existence and technology. While Titus holds the others hostage, Steve travels back to get photos of the giants and to fetch Dan and Fitzhugh who try to sabotage Titus's attraction beam that pulled them there.