Free passes to the circus seemed pretty exiting to Djuna and his friend Tommy Williams, and things promised to be even more exiting when they met their old friends Socker and Cannonball at the entrance gate, but they were only the start of a hair-raising experience.

The boys soon learned that the newspaper reporter and the state trooper were trying to uncover a pack of tricksters who were cheating the circus audiences; and as one strange and frightening event follows another, Djuna and Tommy are caught up in the glittering, upside-down world of the circus, and find themselves in the middle of one of the most weird and dangerous mysteries they have ever encountered!