The story begins with the fall - through the clouds, from nowhere to nowhere, and it is not clear, it is a dream or a memory...The main character wakes up and sees the girls with ashen wings and halos. She does not know who she is, and what it was before, and only remembers the fall, so gets the name "Rakka" - "Falling". The names of the other girls, too, represent a vision that they experienced before they were born - or rather, out of the cocoon, grew up in an old house.The city Gly near ordinary people live Serokrylye, required to comply with a set of strict rules. The main rule is: Do not approach the wall surrounding the city. Rakka gets a halo and wings learning to deal with. Every day she discovers something new in the world - and is constantly faced with the mysteries of existence Serokrylyh. Why their wings,if they do not know how to fly? Why is it forbidden to wear new clothes and enjoy the money? Where are they going, and what is involved in their care? No less is the secret of its neighbors, especially coarse Racks, helps Rakka settle in an old house. Maybe,for understanding Serokrylyh should forget about the difficult questions of life and focus on everyday matters, to understand yourself and become a support for those in need of sympathy and support... "Serokrylyh Union" - one of the most enigmatic and multi-valued series.Its symbolism and semantic content allows each viewer to find his own explanation.