When rebellious Liam starts playing 'Shrinkle' on his babysitter's phone, he has no idea what he's letting himself in for. The app shrinks Liam and his brother Max to the size of a minifigure! Their safe home has suddenly become a treacherous landscape. Can they scale sofa mountain, escape Miss McBoob's snoring mouth and outsmart the now-giant pet cat? And will they stay tiny forever?