The Thorn family's perfect facade is shattered when Robert, the US Ambassador to Rome, and his wife Katherine, who have longed for children, are presented with a devastating stillbirth. In an attempt to fill the void, Robert is swayed by a priest's suggestion to adopt a healthy newborn from a mother who has just passed away. Without consulting his wife, he agrees, and the family relocates to London. However, eerie events and ominous warnings from a priest lead Robert to suspect that the child they've adopted is the embodiment of evil.

The Omen
A US diplomat's life is plagued by a series of unexplained deaths, and a young boy he has mentored starts to uncover the truth about his mysterious past, leading to fears that he might be a vessel for evil, potentially even the son of Satan.