It's the day of the Treetopolis pet show, Trufts, and Twigs is trying to train his buggle, Whizzy. Things don't go too well and, in the process, Whizzy gets mized up with Whiffy, an identical looking but badly behaved buggle owned by the Mushas. Things go from bad to worse when Whiffy creates havoc by sending a herd of aphids into a wild stampede! Can Twigs work out how to get Whizzy to round up the aphids and bring them safely home?