Secret of the Blackbirds (Russian: Тайна «Чёрных дроздов») is a 1983 Soviet crime film directed by Vadim Derbenyov.
[1][2][3] The head of a wealthy family, Mr. George Fortescue, has been poisoned.
Inspector Neal is investigating and learns that the deceased was an unpleasant person.
His death was beneficial to all members of the family.
The violent death of the maid Gladys, and later the mistress of the house, Adele, completely confuses the investigation.