Silas and the Dark Castle

Every year a girl is chosen from Kingfisher Island and taken to the Mainland, a prosperous place where all the wealthy live. She is given a good life and support so that she will not grow up in poverty. Paradise Travels should be any girl's dream. Silas, a resident of Kingfisher, thinks nothing of it until his little sister Adele is taken.
From there, doors began to open and dark secrets are spilled out. A mysterious swordsman named Akir shows up on Kingfisher, and he has answers to Silas's questions. Together, they must embark on a journey to save Adele before it is too late.