Loving but irresponsible dad Daniel Hillard, estranged from his exasperated spouse, is crushed by a court order allowing only weekly visits with his kids. When Daniel learns his ex needs a housekeeper, he gets the job -- disguised as a British nanny. Soon he becomes not only his children's best pal but the kind of parent he should have been from the start.

Immediately after their miscarriage, the US diplomat Robert Thorn adopts the newborn Damien without the knowledge of his wife. Yet what he doesn’t know is that their new son is the son of the devil.