Humphrey is a handsome rough haired ginger guinea pig - with attitude. He's adventurous, accident prone, overweight due to an unquenchable appetite, and has an inquisitive nature that leads him into all sorts of trouble.

Humphrey shares his cage with his rather timid companion, a smaller smooth haired black guinea pig named Sooty. They are devoted, enjoying a surprisingly inclusive social life with the family.

In this adventure, Humphrey is treated with great love and kindness by his hero, and in turn shows true generosity on Christmas day.