Masha Khamitova, a 5th grade student, stays at home alone because her parents are leaving on an urgent business trip. A nanny was called to look after Masha, who was found through a fashionable online service. However, who could have guessed that the nanny was hatching an insidious plan? Now Masha has one night to bring the criminal to clean water with the help of neural networks and modern gadgets, showing her who is the boss in a smart home.

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