Tess and her brother, Max, are sent for the summer to their aunt s sleepy village in the English countryside, where excitement is as rare as a good wifi signal. So when Tess stumbles upon an old brass key that unlocks an ornately carved gate, attached to a strangely invisible wall, she jumps at the chance for adventure. And the world beyond the gate doesn t disappoint. She finds rose gardens, a maze made of hedges, and a boy named William who is just as lonely as she is.