On the planet Wasteland, a routine flight to deliver cargo from a spaceport to a military base is interrupted by an attack from outside. The convoy's equipment and its security - combat robots were destroyed by an unknown weapon and an unknown enemy. What is this? An invasion of an alien race or top-secret developments of the military? Whatever it is, it will be up to the weapons expert Somaha Oliman, who by chance once again found himself on his home planet with the crew of the foreign trade ship Zabuldyga, and the pilot of the combat robot Peter Svistun, who arrived on Wasteland in search of his missing friend.