Shining Force II

The action takes place one dark and rainy night. In Granseal Castle, a thief named Slade unwittingly breaks the power of a magic seal by stealing the jewels of Light and Darkness; this unseals the demon king Zeon trapped therein. The following day, King Granseal falls sick when he is attacked by an unknown creature and Sir Astral, the court's advisor, along with his apprentices, Bowie the squire, Sarah the healer and Chester the knight, investigate these events at the castle. They find that the door to the Tower of Ancients has been unlocked and stands open.