Artist, animal lover and would-be swimming sensation Mimi Power knows what it's like to live under the tyranny of a three-year-old sister. Things have never been the same in the Power household since "The Waby" arrived. Finding creative space in all the chaos is getting harder by the minute for Mimi.

But with the school art show looming and a prize at stake that's too good to give up on, Mimi devises a plan that's three-year-old-proof. Or is it? To know for sure, Mimi will have to tap into her big-sister power and find her own little piece of the sky.