About the book: year / After the death of her father, Dasha is in the grip of constant melancholy. The girl feels like a stranger both to her family and to the whole world. A friend, trying to distract Dasha from sad thoughts, suggests creating a video blog. Together they make mystical videos filled with fake rituals. Only one day, friends perform a ritual calling on alterius - the spirit of the looking glass. This time the mysticism turns out to be quite real, and an ominous entity makes its way into the world, which shares one appearance with Dasha for two.