The Debt is an espionage thriller that begins in 1997, as shocking news reaches three retired Mossad secret agents Rachel (Helen Mirren) and Stefan (Tom Wilkinson) about their former colleague David (Ciarán Hinds). All three have been venerated for decades by their country because of the mission that they undertook back in 1966, when the trio (portrayed, respectively, by Jessica Chastain, Marton Csokas, and Sam Worthington) tracked down Nazi war criminal Vogel (Jesper Christensen) in East Berlin. Now, thirty years later, a man claiming to be the Nazi has surfaced in Ukraine and one of the former agents must go back undercover to seek out the truth...