Three years after the events of Ys I and Ys II, Adol Christin and his old friend Dogi are traveling together when they stop in a town and have their fortune told. The crystal ball explodes. They decide to continue to Dogi's hometown of Redmont, and along the way rescue his childhood friend Elena Stoddart from an attacking wildcat. In Redmont they find that the townspeople are being threatened by forces from Valestein Castle — and Adol, as always, takes it upon himself to do something about it.