Crown Prince of Renais, Ephraim is caught in the neighboring nation of Grado when they invade his home. Mounting an underground resistance, he fights against Grado’s prince and his old friend, Lyon, to protect Renais. After Lyon successfully destroys the Sacred Stones and revives the demon king, Fomortiis, Ephraim battles the lord of darkness alongside his sister, Eirika, using the sacred lance of fire, Seigmund.