The action takes place in a modern metropolis. The main character Katya is 17 years old. This is a girl with an inner personal core, with a penchant for reflection, doubts, emotional experiences and the desire to get to the bottom of things. She is finishing 10th grade. Vacations, sunshine, happiness are ahead. But one day changes everything. A movie she watches once triggers a terrible evil into her soul. Occasionally, she finds herself exposed to the influence of certain decayed shadows, disgusting doubles, and mental evil. In her attempts to free herself, she becomes more and more confused, her soul wanders through the labyrinths of the subconscious, suffering until it gains insight and healing support that gives it strength.