Bannister家来了一只新宠物，Zeus原先是警察特种部队的一只英雄犬，然而在Bannister一家看来，做一只牢靠的看门狗它似乎并不够格。圣诞节前夜，Bannister一家出门后，两名夜盗闯进了屋子。Zeus大显身手的时候来了。（文：life_is_good@YDY）                                  　　TheBannisterfamily'snewaddition,Zeus(voicedbyMarioLopez),aformerK-9policehero,appearstobelessthanthedependableguarddogthefamilyneeds.However,whentwoburglars(ledbyDeanCain)setouttobreakintotheBannister'shomewhilethey'reawayforChristmasEve,Zeusseizesthechancetobeahero,provingeverydog-eventhisone-hashisdaybbb