In the aftermath of the Cataclysm, a small Eastern European town finds itself trapped within the confines of an enigmatic purple cylinder. Its boundaries are impenetrable, leaving the fate of the world beyond a haunting mystery. Also, the laws of physics have been upended — distant planets now linger in the skies.

Yet, life endures. The townspeople, resigned to their isolation, have adapted to a fragile existence, striving to live ordinary lives beneath the ever-present shadow of uncertainty.

But for five schoolmates, the humdrum of everyday life is no longer enough. Driven by a desire to uncover the fragmented rumors from the internet and the "urban legends," they decide to embark on a hike to abandoned research institute RADIOSVET. There, it is said, a signal was received — a transmission from the other side.