Hermux is in trouble again. This time, all of Pinchester is in an uproar over his friend Mirrin Stentrills new paintingsmonumental portraits of cats! After all, everyone knows cats never really existed. Then a mysterious old chipmunk appears in Hermuxs shop with what he claims to be a map to the royal library of a prehistoric kingdom of cats. Before long, Hermux is hot on a trail of treachery and deceit leading all the way to an ancient tomb that lies buried in . . . the sands of time.