What starts out as an innocent campus prank at Space Academy almost costs the Polaris unit the chance to become officers in the Solar Guard. For punishment, our hero and his two friends are assigned to spend all their spare time on guard duty in the vicinity of a new building which houses the latest hush-hush project so important to the solar universe.
Here they are able to observe some suspicious events which look to them to be attempts to sabotage a plan to deliver cargo from freighter spaceships to the various planets by means of projectiles shot from the mother ships. Should the plan prove successful, it means the doom of the present methods of transportation in space.
The saboteurs are ruthless, and for a long time the Solar Guard plays into their hands. How the three cadets, through their courage and ingenuity, are able to accomplish the downfall of the plotters makes thrilling and exciting reading. Their gallant work not only saves the project but restores their good standing in the Academy. Here is a rousing story which no red-blooded boy will want to miss!
.
_________________________________________________________________________________________________________________
