An ordinary day in an ordinary Moscow five-story building ends in tragedy: an explosion occurred in one of the entrances. People have lost not only a roof over their heads and property, but also lost their loved ones and relatives... Grief unites people, and now the survivors will have to learn to live anew together. And the main thing is to understand the true causes of what happened.

Pavlik is six years old. He spends a happy and carefree summer at the dacha with his parents, but he gradually begins to notice strangeness in the behavior of adults.