Mouseheart

Hopper is just an ordinary pet-shop mouse before he escapes. Soon he finds himself below the bustling streets of Brooklyn, deep within the untamed tangles of transit tunnels, and in Atlantia, a glorious utopian rat civilization. But all is not what it seems. Though Hopper is treated as a royal guest, he misses his siblings that he lost in the escape attempt. That, and Atlantia is constantly threatened by the rebels who wish to bring the city to its knees.

Hopper now knows that he is definitely not an ordinary pet-shop mouse. With the underground rat civilization of Atlantia all but destroyed and Titus dethroned, Hopper, Zucker, Firren, and a spattering of Rangers are now working to rebuild. But it's difficult. REALLY difficult. Queen Felina, the evil feral royal, has begun amassing a new band of street cats. And without the sinister "peace accord" in place, it is open season on the rodents.

Felina the cat queen may be gone, but the subway tunnels of Atlantia are still dangerous to all rodents who dwell within the twists and turns. Pup and his spider companion, Hacklemesh, are lurking in the shadows.... Hopper is determined to reach out to his brother gone bad, to see if he can talk some sense into the young rodent. But then Hope, the youngest of Zucker and Firren's new litter, goes missing, and all signs point to Pup as the culprit.