Dazzling sunlight is destructive for the inhabitants of the planet Callespa. In underground caves, illuminated by phosphorescent mushrooms, the war between tribes for border territories - barren lands, stalactite forests and bottomless lakes - continues unabated. Eskaranka Orna, a brave warrior of the Cadre, is captured and imprisoned. Exhausting work in the forge only drowns out the longing for her husband and son, but does not heal. At any cost, Orna must escape from Gurt captivity. However, returning home turns into a complete disaster. An unexpected betrayal turns the familiar world upside down.