Unlike her brother Zim, Luna is a red-haired cat with a hot temper. As her furry feline friend rushes and climbs around the house, Luna grrrr's and growls. With their piercing eyes, pudgy bellies and pillows on their feet, even the best of us can't resist cats! But if they make us laugh, cats are not always in a good mood. Will Luna's man and brother cheer her up?