Kat and her cousin Max love spending their holidays at Grandma Toast’s by the sea. They have a great time, get to breathe some fresh air, and more importantly, play with her 3 adorable cats… but even more importantly, ever since a mysterious alien item landed in the garden, Kat has the power to turn the cute kitties into fearsome nin-cat fighters! That’s actually pretty lucky, because they regularly need to defend the city against attacks by very dumb aliens who want to retrieve their device… But there’s no way Kat will ever let them get such a cool toy back! The holidays promise to be full of action, misbehaving and laughter!