Kate is a young girl with a wild imagination. It's that imagination that attracts a bunny named Mim-Mim, who becomes a larger-than-life playmate for Kate as they travel to the fantasy world of Mimiloo. Kate goes there whenever she has a problem at home that she needs to solve. In Mimiloo, Kate can be whatever she wants, from a princess to a pirate. Other residents of Mimiloo include gardener Gobble, inventor Tack and mischievous Boomer. When each adventure ends, Kate has solved her problem and is anxious to get home to tell her parents about it.