Mobile communication capabilities are growing day by day. It no longer surprises anyone that using a telephone you can contact a person on the other side of the earth in a second. What if you can even call heaven using a mobile phone? Or to hell. One day the main character, who has dreamed of magical abilities since childhood, and her friend Arseny, the grandson of a hereditary sorceress, will learn about such an opportunity. But even if you can get through to God or the devil, what can you learn from them? What to ask for? And most importantly, how to distinguish one from the other if they have the same number?