An old sailor tells the legend of a starving polar bear (Charlie) who attempted to steal food, but kept running into a vicious guard dog. To placate the beast, the bear must sing "Rock-A-Bye Baby" to him to make him nod off. Unfortunately the dog wakes quickly at the slightest noise, and is cranky. The dog eventually chases the bear up a tall mountain. At the end of the picture the sailor says that if you listen carefully you can still hear the lullaby. Indeed, at the peak the pair stand — both very old and grey now — with the bear holding the dog tenderly and singing "Rock-A-Bye Baby."