During an excursion to a research center, 17-year-old first-year student Zhenya accidentally gets into a test sample of a new model of the robot "Apostle" (A.P.O100L), which has its own will and mind. Having received a random pilot, the machine takes control and decides to escape from the laboratory. Now, in order to return home, Zhenya will have to find a common language with artificial intelligence.

A search for a lamb missing in the mountains leads a shepherdess to a strange girl exploring the acoustics of a local cave. The tale of sound waves and invisible connections unfolds like the dream of a lonely woman returning home after a long day at work.