From the description: Weird magic and wondrous tricks await in this adventure for the world’s greatest roleplaying game! Strangelight Hall is an ancient mansion that stands on the edge of a lonely and dangerous moor. The owner has recently gone missing and the mansion is now filled with weird magic, unsettling haunts, and bizarre creatures. But there are greater powers at work and a deeper mystery at hand. It will require all of your courage and wit to unravel the secret of Strangelight Hall... The Secret of Strangelight Hall is a 4- to 8-hour adventure for 1st- through 4th-level characters. It has been thoroughly playtested, requires minimal preparation to run, and can be easily used with any Fifth Edition campaign!