This book follows the adventures through space of the three young cadets who serve on the Solar Guard. Tom Corbett, Astro and Roget Manning are chosen to participate in the second run to Tara, a world orbiting Alpha Centauri.
They have new, strict commanding officer, with whom they realize that there are two freebooters, whose intention is to steal from the riches found on one of Tara’s small satellites.
In order to prevent the stealing, Tom Corbett, his friends and the new commanding officer land on the satellite. But, they didn’t come there with no reason, but they have prepared a plan on how to stop the freebooters from taking way the valuable minerals away.
How do they plan to prevent the stealing? What is their plan? Will they succeed?
Follow the adventures of the three young cadets and their commanding officer in this story filled with action, humour and mystery.