- Nick Pearson is a life-long bachelor who is finally settling down. On the brink of his wedding he is surprised to find he has a 13 year old son who has come to find his him through the help of a psychic. The problem is Nick can't stand kids and would happily send the boy back to live with his biological mother, except …
- 故事紧接前三部。萌犬的家族越发壮大了,泰妮结婚了,生下了可爱的萌犬宝宝辛迪、罗希、查理和布罗迪。隆冬将至,泰妮迫不及待要跟自己的宝宝们共度他们降生后的第一个圣诞节。然而,比起和家人共度美好时光,小家伙们似乎更热衷于拼命搜刮礼物。为了让孩子们体会到圣诞节的真正含义,泰妮和老公筹划了一场萌犬好声音圣诞节特别节目,向家人演唱…