Kingsglaive: Final Fantasy XV

During a visit to Tenebrae, Regis and Noctis—who is recuperating from a near-death experience—are targeted for assassination by Niflheim. Tenebrae is subsequently attacked, and in the invasion Queen Sylva is killed by Niflheim's General Glauca. Regis attempts to flee with Lunafreya, but she decides to stay with her brother Ravus; both become subjects under Niflheim's rule. Read more on Wikipedia.