Refusing to serve Doctor Weber, the astronauts escape, meeting other runaways. A hunt is underway to destroy them. Fleeing, they find refuge in the Labyrinth cave. Soon the hideout becomes a stone trap with the exit bricked up. In the team there is a traitor; from him they learn about a second exit. Suddenly Lagner arrives with a call for help from his device. The fugitives leave—they learn the help is coming. The rescuers break the Witch army, but they fall into a trap: ahead lies a road— a Mirage: a column of machines with the army disappears in the swamps under a hail of bullets. Defeat! A message from the enemy’s camp helps them. They manage to get out. Releasing the captives, they leave planet ZET. Tenyanyin laments: “We’re defeated and fleeing!” A red-planet man exclaims: “We’ve won!” The ships head out into the vastness of the Universe. Half an hour later, phrases race after them: the first: “Damn red-planet man. I wanted to take your brains, and you take my life!” The second phrase of the philosopher: “Don’t do evil—it comes back like a boomerang.”