The main characters of the film are three friends working together - Stepanov, Chernov and Belov. Their construction company is thriving, receiving a new order, but constant emergencies begin to occur around the construction site - first strikes, then an accident with a worker, the death of a foreman... In addition, each of the friends hides something from each other, omissions breed suspicion and distrust... Will their friendship stand the test of difficulties? And will the perpetrators of the murders be found?

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