Le Muguet (2016)

Set in a fictitious duchy in medieval France. This is the story of how the son of an earl grows up as he searches for the truth about the death of his first love. Lucian, the son of an earl, receives secret orders to look into the truth of the circumstances regarding the execution of Lady Charlotte, a noblewoman who married into a neighboring duchy. Charlotte was executed for the suspicious murder of her husband, Lord Garnier. Lucian believes that Charlotte was set up, so he goes to Lord Garnier's lands to contact his heir Emma, Garnier's daughter by his first wife. As Lucian struggles to uncover the hidden truth about Charlotte's death, will both duchies be able to evade war?

Unfortunately the movie Le Muguet is not yet available on HBO Max.