Warriors: The Beginning of the Clans. Shining Star

The great battle ended in peace, but the roots of the Four Trees are now soaked in blood: almost everyone in the valley lost relatives and friends in the brutal clash. Grief and fear took residence in the hearts of the cats. They vowed to live in peace in honor of their starry ancestors, but keeping this promise is not so easy.
Gray Wing, broken by illness and the death of Turtle Tail, cedes power to Thunder, while Clear Sky is expelled from the camp by a ruthless invader from the wasteland. To top it all off, a mysterious disease appears out of nowhere, claiming the lives of those who survived the clash.
To endure and triumph, the cats must find the mysterious Shining Star, but the path to the revelation will not be easy. Betrayal, deeply clawing into the heart of the forest and the wasteland, leads their inhabitants into a deadly trap...