[Machine Translation] Chased by bullies, Eustis and Jill jump through a door behind the gym into another world. In Narnia, Prince Lillian, son of their old friend Caspian, has been kidnapped by witches and taken prisoner. In order to rescue the prince, the two, together with Doronageki of the Numahyorin tribe, follow Aslan's Four Signposts. A giant's bridge, a ruined city, a dark castle, and a silver chair. The bond between the two friends is put to the test in the face of numerous difficulties.