In a mansion on a hill, lived a man no one could kill. Raised the dead with magic dark to rule the world and make his mark. Zari has always been fascinated by creepy stories about Hezekiah Crawly, the real-life inspiration behind her local amusement park's haunted house attraction, so she's thrilled when her friends Mateo and Taylor agree to go on the last ride of the day before the park closes. But when the ride breaks down, the three get trapped inside the haunted house for the night! As if that weren't scary enough, the kids stumble onto a hidden staircase leading to a dark, cobwebbed crypt that doesn't seem like part of the ride—and by the looks of it, they aren't alone down there. Is it possible the stories about Hezekiah Crawly and his monstrous experiments are true? And if so, can Zari, Mateo and Taylor make it through the night in one piece?