On the planet Arzor, where colonists from Earth and the local indigenous population live peacefully, strange and terrible events begin to occur. Allegedly, people and natives are dying in the middle of the night from elusive creatures that leave no traces behind. The only thing that can be established is that the night killers come from the desert and prefer to kill exclusively intelligent creatures. Unable to fight the deadly creatures, the warlike tribes of the natives are removed from their homes and begin to crowd out the colonists. A big war is coming for a place in the sun, and it can only be stopped by finding the mysterious killers. Only the master of beasts and a girl with a special gift from the starship “Ark”, who arrived on Arzor with an environmental mission, can do this.