A little bit of the Wild West still survives in Heartstoppers Haunted House, except that "survives" implies that its inhabitants are living. Visitors first find themselves in the heart of the Deadlands, a town once and still terrorized by the murderous gunslinger, Cyrus Lynch. His zombified victims, freed from their shallow graves, now inhabit the saloons and general stores, seeking revenge on their killer and someone who can figure out how to make the player piano play anything other than "Old Susanna."

In their haste to leave town, the visitors stumble through the Tomb of Shadows—a dark, winding maze with a gauntlet of surprises—and into Steamghást Asylum, the abandoned rehabilitation center for the area's criminals. Overrun by insane doctors and bloodthirsty killers, the medical monstrosity of steam and electricity still reverberates with the screams of unwilling test subjects.