ThefilmcentersonyoungMariah,alittlegirlwhodreamsofgettingadogforChristmasyearafteryear.ThisChristmasherdreamisfueledafterseeingapuppynamedPrincessatthelocalpetstore.Toseeifshe'sreadyfortheresponsibility,Mariahistaskedwithdog-sittingheruncle'scrazycanineJack,whoupendsthefamily'sholidaypreparationswit...