It's 1969 at a strict English girls' school where charismatic Abbie and intense and troubled Lydia are best friends. After a tragedy occurs at the school, a mysterious fainting epidemic breaks out threatening the stability of all involved.
Marcella Backland left the Metropolitan Police for the sake of her family, only to have her husband leave her. She returns to her job on the murder squad, investigating a case that seems disturbingly familiar to her.
A Palestinian assassin is targeting prominent Israelis. An English actress is recruited by the Israelis to infiltrate the assassin's terrorist cell. This will require all of her acting talents and put her at considerable risk.