TheadventurebeginswhenthelovingownersofthreeirresistiblepetsChance,afunlovingAmericanbulldogpup;Sassy,ahilariousHimalayancatwholivesuptohername;andShadow,awiseoldgoldenretrieverareforcedtoleavetheminthetemporarycareofafriendwholiveshundredsofmilesawayButafterseveraldays,theworriedanimalsbegintotheirfamilymustbeintrouble,sotheydecidetoheadforhomeOntheirincrediblejourneyacrosstheruggedlybeautifulSierras,theyencounterunexpectedsurprisesfromman,beast,andnaturealike