Danemark 1770. La passion secrète que voue la reine Caroline Mathilde au médecin du roi, l’influent Struensee, va changer à jamais le destin de la nation tout entière. Royal Affair relate une page capitale de l’histoire danoise, oubliée des manuels français. La relation amoureuse et intellectuelle entre Caroline Mathilde et Struensee, fortement influencée par les philosophes des Lumières, Rousseau et Voltaire en tête, conduira au renversement de l’ordre social établi, et annoncera les révolutions qui embraseront l’Europe vingt ans plus tard.
Danish soldier Esben fakes his own death in an attempt to flee the war and reunite with his beloved wife Kirstine and their son Karl after being apart for three years. However, everything has changed while he has been away. A charming German officer has taken over the role as the family’s father and is courting Kirstine. While hiding in his own attic, Esben witnesses this very real nightmare and must do everything in his power to survive, win back the love of Kirstine and save his family.