Startling Sky is the Beta of a group of cats who call themselves Blue Moon. Everything has been good so far; prey is running extremely well, the nursery is full with a new litter of kits, and everyone is happy. Other than the occasional skirmishes they have with Fangtooth (the group of cats living right outside their territory), or the hot weather, life has been easy during this lush green-leaf.
Then, expectantly, trouble strikes. Leaf-bare comes around, and things get rather difficult. The cold hits them without warning; it begins to snow very early, when it's only mid-leaf fall. With all the changes they made to their lifestyle after the previous moons of hotter-than-usual weather, the cats of Blue Moon are completely unprepared. One by one, Startling Sky's group mates begin to succumb to illness and starvation. What makes matters worse, is that targeted attacks from Fangtooth are on the rise again.
The Alpha of Blue Moon, Shattered Pebble, sends Startling Sky off on a dangerous mission to put a stop to their problems once and for all. And despite the difficulties she may encounter on the way, as Beta, she's determined to keep her head up and look out bravely into the horizon. Of course, bravery isn't the only thing she'll need to succeed; trickery and intelligence can come in handy. Most of all, lies.