The people in robes with hoods who drew magical symbols and cast spells in the basement of house number 666 actually did not mean anything bad. They just wanted to relieve boredom and, perhaps, establish friendly connections with the other world. It was nothing more than an unfortunate accident that their witchcraft manipulations opened a portal in the Universe, where the devil himself rushed. But now, it seems, humanity is doomed - there are only a measly three days left until Halloween, when all hell breaks loose. Unless young Samuel Johnson has time to take action. Although he is a gifted boy, he is far from a superman, which means he cannot do without the help of his loyal friends, including a nice dog named Boswell.