The artificial brain Sig, created under the guidance of Professor Yavorovsky, disappeared in one of the research institutes. Meanwhile, strange phenomena are happening in the city: all the zoo animals have been released from their cages, and the books in the city's book depository have been mixed up. And Whitefish, having mastered the accumulated experience of science and fiction accumulated by mankind, creates an artificial organism himself, returns to the professor and is soon sent to the constellation Gemini.

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