Would you sacrifice your past to change your fate? Japan, 1859, and the decline of the samurai era. Akayama Arata and his young wife Mei become hostages following a raid by shogunate soldiers on their mountain estate. The soldiers' target was Arata's brother, the enigmatic lord of the Red Mountain, but he has fled and the ornate house now stands empty. Arata and Mei need to find a way to escape or else lure their lord back and betray him. Yet Arata's injuries have left him with no memory of his former life and he is forced to rely on Mei to understand who he once was and the role he played in his clan's downfall. The strange and beautiful Mei has her own secrets though, and their time together is running out. As Arata endeavours to piece together events, he finds himself borne deeper into the family's tangled web of lies, betrayal and revenge.