From the publisher:
The first of the two Figure and Tile Collections, Recurring Nightmares, includes all eight investigator figures, eighteen plastic monster miniatures, and fifteen double-sided map tiles from the Mansions of Madness First Edition core game. Take on the role “Ashcan” Pete, the drifter, and make use of his loyal hound dog, Duke, or assume the attributes of Harvey Walters, the brilliant professor. With Recurring Nightmares in your collection, you may also encounter a host of long-forgotten monsters, such as the fearsome Chthonian or the unpredictable Maniac.
When you include the First Edition core set or Recurring Nightmares pieces in your game, you will also gain access to a brand new scenario. Tasked with solving the mystery of missing bodies from Hangman’s Hill Cemetery, you and your fellow investigators will need to explore the misty and sinister graveyard. You may find the corpses you seek, dead as they ever were, or perhaps some sinister reanimation of their bodies will find you first.