Following a serious illness Will is sent to stay with his uncle in the wild bleak mountains of Tywyd. He is troubled by vague memories until he meets the mysterious Bran
- & suddenly Will knows the task that lies ahead. With Bran's help Will set outs to find the golden harp & awaken the six sleepers who must join the final battle between the Dark & the Light. But Will is about to encounter his most terrifying opponent yet: the Grey King.