At an isolated boarding school bordered by a forest no one is allowed to enter, whispers become warnings, and warnings become obsession. Andrew spends his nights drawing grotesque creatures while his closest friend, Thomas, writes unsettling stories that seem to bleed into reality. But when the monsters from Andrew’s sketchbook begin appearing beyond the page, the line between imagination and nightmare starts to unravel.

Piranesi lives in an endless House of soaring marble halls, countless statues, and tides that flood its lower chambers. He spends his days carefully cataloging its wonders, believing there is no world beyond its walls, while receiving cryptic visits from the only other person he knows. But when impossible clues begin to appear, long-buried memories stir, and the House reveals secrets that challenge everything Piranesi believes about himself and the world he calls home.