Many people love Halloween. They love its sweet taste and smell, which brings back memories of childhood. Colorful outfits and frightening masks are just a tradition that has changed over the years. Adults say that fear can be driven away by fun, that the monster under the bed will disappear if you put on its skin. However, this is not true. All the monsters from children's horror stories are real, they are all part of the world of Halloween. Henry Archer is a former student and now a bookseller - a guy with childhood fears, a lover of peace and his ordinary life. Without realizing it, the guy followed the black cat he met, allowing himself to be drawn further and further from the life he had created for himself. The world of Halloween is no place for cowards. The creator of this world, the demon Samhain, will not give up on his goal - to make the human world the same as his monsterland. Henry cannot cope with the burden of being a hero and savior of humanity. He is not a hero, just a scared boy. However, he has something that no other evil spirit in the world of Halloween has. Henry has a heart.