An American diplomat named Robert Thorn, who works in Rome, faces a chilling experience when his wife, Katherine, gives birth to a stillborn baby. To spare her from suffering, Robert decides to adopt an orphaned child, unaware that this decision will trigger a series of terrifying events. Little Damien enters their lives, and although everything seems perfect in their new home, a sinister evil begins to surface.
From the beginning, Damien seems to have a strange and unsettling aura that affects those around him. As the boy grows, inexplicable deaths and macabre incidents start accumulating, turning Robert's life into a nightmare. Katherine becomes obsessed with her son's bizarre behavior, and a warned priest suggests that Damien is not an ordinary child but the Antichrist.
As the pieces of the puzzle come together, Robert is forced to confront a terrible truth: his son is the embodiment of evil. Desperate to protect his family and unravel the darkness surrounding Damien, Robert embarks on a race against time. Amid horror, guilt, and his love for his family, the story reaches a chilling climax that challenges the limits of what a father can endure. The final revelation leads to a confrontation that will terrify the viewer.