Five centuries ago, the Ancient War destroyed human civilization. In the middle of the vast desert called the Hollow Lands, there are seven cities built long ago by the descendants of the few survivors. To compete for power, the cities annually organize the Gladiator Tournament - a brutal competition held at the mysterious Polygon - a secret technology capable of creating illusory spaces. Maxim, the young leader of a team of diggers, during his next expedition to the Hollow Lands, accidentally finds a bunker from the time of the Ancient War. Inside it, a girl is discovered who remembers nothing except her own name - Elena. Realizing that unfriendly forces might be interested in his unusual find, Maxim decides to hide the girl in the city of outcasts. However, the guy doesn’t even suspect what ancient power he brought into his World...