"IWantaDogforChristmas,CharlieBrown!"centersonRerun,LinusandLucy'slovablebutever-skepticalyoungerbrother.It'sChristmasvacation,andasusual,Rerun'sbigsisterisstressinghimout,sohedecidestoturntohisbestfriend,Snoopy,foramusementandholidaycheer.Howeverhisfaithfulbutunpredictablebeaglecompanionhasplansofhisown,givingRerunreasontoaskSnoopytoinvitehiscaninebrotherSpikeforavisit.WhenSpikeshowsup,itlookslikeRerunwillhaveadogforChristmasafterall-butthentherealtroublebegins.