It would seem that for such a self-confident person as Charlie Benjamin, what could be easier than another exam? Especially if his unusual gift - opening portals connecting worlds - has more than once helped him get out of even such troubles. But the fact of the matter is that Nightmare Academy is not an ordinary educational institution. Anything can happen here. This is what actually happened: a seemingly simple task entailed monstrous consequences - five of its overlords penetrated the Earth from the Lower World and declared war on people...