Lionheart and Tigerclaw say that a union of the Clans is a treacherous and terrible idea [[note]]much to the amusement of readers who have already finished ''The Darkest Hour''[[/note]]. Two moons later, Firepaw is attacked by a rogue named Yellowfang while on a solo hunting mission. He injures her leg, rendering her unable to walk, and she looks hungry so he hunts for some food for her. Firepaw eats the scraps, breaking the warrior code because he is feeding himself before the Clan. His Clanmates appear and inform him that Yellowfang is the [=ShadowClan=] medicine cat and take her prisoner after learning she has left [=ShadowClan=]. Firepaw is punished for breaking the code by being forced to look after Yellowfang. Bluestar decides at this point that she willTigerclaw, because all apprentices must journey to the Moonstone before becoming warriors. When they reach the cave with the Moonstone inside, Graypaw and Ravenpaw are left outside as guards. Bluestar, Tigerclaw and Firepaw go to see the Moonstone, but Tigerclaw gets scared and runs away. Bluestar finds out that they must return to camp at once. On the way back they are ambushed by rats. A loner called Barley saves them, but not before Bluestar is killed. Fortunately, Clan leaders have nine lives, so Bluestar comes back to life. She tells Tigerclaw she has four lives left. When they get back to camp, [=ShadowClan=] is attacking. The deputy Blackfoot kills an elder named Rosetail, but Yellowfang defeats him and the [=ShadowClan=] cats run away. Yellowfang is welcomed as