That night, Firepaw dreams of a brilliant light, burning coldly like a star and disappearing quickly; it banishes the darkness and imparts a feeling of safety. But then, Firepaw hears piercing yowls of fear and sees dark warriors with sharp claws and glittering eyes chasing ThunderClan cats, who flee before them. Firepaw wakes in a panic but quickly banishes the dream when he remembers the journey to the Moonstone that day. Firepaw sets out with Bluestar and the rest of the group; they cross through WindClan territory, where the scent of ShadowClan is strong, and across the Thunderpath, where Firepaw narrowly avoids being hit by a monster. HighStones, the assemblage of small crags and peaks that houses Mothermouth, the cave where the Moonstone is located, is visible in the distance. At moonrise, Bluestar leads the group into HighStones.

Bluestar chooses Firepaw and Tigerclaw to escort her through Mothermouth to the Moonstone while Ravenpaw and Graypaw stand guard outside. The tunnel inside Mothermouth is dark and very narrow; the cats are guided by scent and feel alone. When they reach the Moonstone, Firepaw is dazzled by its appearance; it shines brilliantly with moonlight from an opening in the cave roof, and Firepaw realizes this is the light he saw in his dream.