Betrayed by her family, Nora, a musician, accidentally forms a pact with Azel, the Sea Demon King who had been sealed away for a century. In a quest to find her mother and uncover the truth, the two embark on a seven-night adventure, fighting against human nobles who engineer maritime disasters and radical sea tribe factions that incite war. Along the way, they break down racial barriers and learn the true meaning of trust and sacrifice.Ultimately, Nora gathers seven musical notes and uses her song to awaken both races' desire for peace, ending a century of hatred with love and courage, and achieving her own growth and redemption.
