Ostrolapka, Lionpaw and Sparrow, who are trying to understand what the possession of the "power of the stars" promises them, bear a heavy burden of responsibility for the future of all tribes. The powers and abilities of the three squires are put to the test when the Thundercats are unexpectedly attacked by those from whom they could not have expected it in any way. All the tribes find themselves embroiled in a terrible battle.Darkness is gathering over the forest, and a mysterious stranger warns the forest cats about the coming dangers. It seems that for the first time the Star Tribe has no answers to the questions of their wards...