Sweetflower and Largestep have given birth to four kits: Shimmerkit, Seedkit, Puddlekit and Marigoldkit, and StarClan have chosen these kits to fulfill a prophecy. Then, Puddlekit finds a horrible secret about his Clanmates. Can the kits save the Clans from themselves?

"Poisonous flowers can grow in the prettiest fields." The four Clans of warrior cats who have lived by the Twolegplace for generations are being threatened by an unknown enemy. Desperate to save the warrior Clans, StarClan sends four apprentices to save the Clans, were they learn that danger lurks behind the most familiar faces.