Major Alexey Grechin dreamed of quickly closing the case of the death of businessman Darkin, because soon he would have a wedding with his beloved girl Marina and a romantic trip to Italy! At first, Grechin did not attach much importance to the disks, which the businessman for some reason kept in a safe along with a huge amount of money. But when the investigation into the murder of Darkin, who was hanged on the railing of the stairs of his own luxurious home, came to a dead end, Grechin still decided to see what was hidden behind the innocent covers with the titles of famous children's films. He was shocked by what he saw. It turns out that Darkin had something to kill for! Now Alexey is privy to these dirty secrets, and he himself is in serious danger... And his happy marriage with Marina too!