Theadventurebeginswhenthelovingownersofthreeirresistiblepets(Chance,afun-lovingAmericanbulldogpup;Sassy,ahilariousHimalayancatwholivesuptohername;andShadow,awiseoldgoldenretriever)areforcedtoleavetheminthetemporarycareofafriendwholiveshundredsofmilesaway.Butafterseveraldays,theworriedanimalsbegintotheirfamilymustbeintrouble,sotheydecidetoheadforhome.OntheirincrediblejourneyacrosstheruggedlybeautifulSierras,theyencounterunexpectedsurprisesfromman,beast,andnaturealike.