Halloween is a mercenary who tries to stay away from any wars. But one day, going to the world where his beloved lives, he finds himself drawn into a confrontation between powerful magicians and monsters. From now on, he has the key to all the doors in his hands, there are two armies behind him, and in order to survive, he will have to choose one side and deal with the demons of his past. Meanwhile, representatives of the most powerful non-humans meet for negotiations in a closed world. At first everything goes well, but soon two diplomats are killed and one goes missing, and now several monsters are locked in one tower until the culprit - which was one of them - is found.