Summary

When Storm leaves ClearSky because of his horrid ways, she retires to a monster's den. She stays there until there is a horrible accident there where she doesn't make it, and none of her three kits make it, except for one, saved by GrayWing. From there on, he names him Thunder and is raised on the moorland. But, suddenly, there is a forest fire which puts GrayWing's brother and his clan in danger. So the moorland cats try to help, although it's Thunder who acted the most impressive, which ClearSky notices. He then says to join his clan, which Thunder agrees to. But after a few days, Thunder realizes the cruelty beneath ClearSky and leaves along with a cat name Frost, who was going to be kicked out of the clan by ClearSky for being injured. So the two leave the forest, in hopes of fitting in with the moorland cats.