Ellie the Fairy and Ronald the Dwarf have returned to their home village of Greenhill after a brief absence from The Mystery of Greenhill. Literally the day before, they went to the forest to collect herbs, and when they returned, they found all the houses and streets empty. People seem to have disappeared all at once. In some houses, food was being prepared on the stove, as if the hostess had left for a minute. The dogs barked furiously, the cows mooed, and the cats huddled under the benches. Looks like black magic is at work here. The heroes are confused, but then they decide to find out what happened. To do this, they need to carefully examine everything and look for at least some evidence. Surely something must remain and indicate what could have done this in The Mystery of Greenhill.