Vos′myrichnyy chlopchyk Piter choch i zhyve z rodynoyu, ale pochuvayet′sya duzhe samotnim, bo v bat′kiv nikoly ne vystachaye na n′oho chasu. A sche vin mriye pro kota, yakoho yomu ne dozvolyayut′ trymaty. Tayemnychym chynom Piter sam peretvoryuyet′sya na kota y piznaye vsi neharazdy, yaki chekayut′ prybludu na vulytsyach velykoho vorozhoho mista. Vin znayomyt′sya z takoyu zh bezdomnoyu kishechkoyu Dzhenni, yaka dopomahaye yomu ovolodity mystetstvom neprostoho kotyachoho zhyttya. Druziv chekayut′ karkolomni pryhody, smertel′ni nebezpeky, mandrivka do SHotlandiyi, zrada ta spravzhnya druzhba. Piter navchyt′sya buty kotom, a Dzhenni… znovu ­poviryt′ u lyudey.