ThefilmfollowsthefunadventuresofthreeancientEgyptianmummieswholiveinanundergroundsecretcity, hiddeninancientEgypt.Thetrioincludesaprincess, aformercharioteer, andhisyoungerbrother, alongwiththeirpetbabycrocodile.Throughaseriesofunfortunateevents, themummiesendupinpresent-dayLondonandembarkonawackyandhilariousjourneyinsearchofanoldringbelongingtotheRoyalFamily, whichwasstolenbytheambitiousarchaeologistLordCarnaby.