[[ CONTAINS SPOILERS ]]
The Killing of a Sacred Deer follows the life of a surgeon, his wife, daughter and son change slowly, due to the care and support the surgeon offers to a boy in the neighborhood.
At first the surgeon and boy only meet once every while, but soon after the contact increases, expensive gifts are exchanged, and conversations have become more personal, a more sinister tone comes into play.
After the comfortable and successful lives of the surgeon's family already is in decline, and fear it will only get worse increases, it becomes clear that the boy's motive is revenge for a death that has occurred on the operating table.
The boy seems to be at least one step ahead of attempts to regain control of the situation, and lets the family slide into a horrifying nightmare.
