A missile sent by an unknown enemy shoots down an earthly spaceship, and the brave scout Adam Tan ends up on the mysterious planet Tskei, where five alien races have settled. Green-skinned barbarian nomads, mysterious underground inhabitants, amphibious people - you name it. And all these nations are waging an endless war, using people as slaves. But the earthling certainly wants to free all the people of Tskei and escape from the planet of adventure. In search of a suitable spaceship, he will more than once have to cross the expanses of an unusual planet, visit exotic countries with an outlandish way of life. Incredible animals, ancient cities, court intrigues - the brave adventurer will have to go through everything. The secrets of Tskei await the fearless earthling...