The dreamer Arina has a special gift - to see real dreams. Her memory is unique. Living a new life in her dreams, she remembers every event, every little thing. Her love for ancient artifacts and historical events makes the girl’s unusual “adventures” even more atmospheric. Each time, plunging deeper into her dreams, she does not notice that she is becoming different to those around her. Situations gradually become more complicated, problematic triggers emerge more and more often, and getting out of sleep becomes increasingly difficult. “Arina and the Secret of the Family Castle” reflects one of her first journeys into the world of the astral plane and is intended to acquaint the reader with Arina’s initial attempts to study herself. The girl, having felt the influence of medieval Europe for the first time, does not yet understand where her further similar adventures will take her.