WELCOME TO ST. MAGNUS MEMORIAL. PLEASE REMAIN CALM. You won't. Maverick and Maddi are only there because their parents are. Just for the summer. But something isn't right. Doors lock when no one is watching. Hallways don't always lead where they should. And the hospital seems to be hiding something... alive. What begins as curiosity quickly turns into something far more dangerous. Because St. Magnus isn't just a hospital. It's an experiment. And the subjects are already inside.