Lilypool is given a prophecy as a kit of a "cat of shadows". She is guided along the way to find out what it means by a StarClan warrior. Lilypool and her clan go through many challenges, but nothing is comparable to when her clan is infiltrated by rogues that rip her clan and the other clans apart from the inside out. Lilypool must find a way to build them together again and rise up against the "Cat of Shadows" she was warned about since kit-hood. Limits and loyalties will be tested and the fate of all the clans will be at stake.