Bannister家來了一只新寵物，Zeus原先是警察特種部隊的一只英雄犬，然而在Bannister一家看來，做一只牢靠的看門狗它似乎并不夠格。圣誕節(jié)前夜，Bannister一家出門后，兩名夜盜闖進了屋子。Zeus大顯身手的時候來了。（文：life_is_good@YDY）TheBannisterfamily’snewaddition,Zeus(voicedbyMarioLopez),aformerK-9policehero,appearstobelessthanthedependableguarddogthefamilyneeds.However,whentwoburglars(ledbyDeanCain)setouttobreakintotheBannister’shomewhilethey’reawayforChristmasEve,Zeusseizesthechancetobeahero,provingeverydog-eventhisone-hashisday.