Basil the moust detective sets off on a journey to solve one of the greatest mysteries of mousedom: Do miniature cats exist? Leading mouse scientists aren't certain, but they believe answers can be found in the Far East.

Thus begins the story of an unusual quest. As Basil sets sail for the Far East -- and the lost island of Kataarh -- danger stalks him at every turn. Our hero is determined to unravel the mystery of these mini-cats and their mouse king!