SometimeaftertheMousekewitz’shavesettledinAmerica,theyfindthattheyarestillhavingproblemswiththethreatofcats.Thatmakesthemeagertotryanotherhomeoutinthewest,wheretheyarepromisedthatmiceandcatsliveinpeace.Unfortunately,theonemakingthisclaimisanoilyconartistnamedCatR.Waulwhoisintentonhisownsinisterplan.Unawareofthis,theMousekewitz’sbegintheirjourneywest,whiletheirtruecatfriend,Tiger,followsintentonfollowinghisgirlfriendgoneinthesamedirection.