Sometimes being the youngest in the family means that Izzy feelds invisible at home. But when Nana's latest science experiment backfires, she finds out what it's really like to be invisible! While Nan searches for a cure, Izzy has fun exploring her new powers - but Mum, Dad and sister Carrie aren't impressed. Can Izzy use her invisibility to help her friends, and regain her big sister's trust? Luckily Perky the Parrot is on hand to help!