The Girl with a Nightmare in Her Pocket. The Mystery of the Smiling Cat

Nightmares come not only in dreams but also in reality...

Beyond the realm of the real world, there is a place where true Nightmares live in ominous labyrinths. Get there—and you won't be able to escape. That's exactly what happened to Father X when she was very little.
But now X has grown up and decided to save her father at all costs. She is ready to venture into the world of Nightmares, along with her loyal helpers: the Smiling Cat and Klyaks Handkerchief, who lives in her pocket.

But the danger lurks not where they think...