Defensive powerhouse Sieg works as a gatekeeper at the Royal Capital. He and the Fifth Squadron troublemakers under his command have successfully defended the city against bandit gangs, hordes of undead, vicious monsters, and former allies-turned-demons. Now, the royal family has caught wind of their accomplishments, and the princess, the Oracle of Light, has enlisted their help to escort her on her pilgrimage. So, they're off on the long journey to the Sacred Spring—and demons are all but guaranteed to attack the Oracle along the way! Will Sieg, Seira, Spinoza, and Fam be able to protect the Oracle on her sojourn, ensuring not only her safety but that of the Orb of Light as well?