The adventurer (Rei), who was once called "Sword Demon", formed a party with the three daughters he picked up and raised, and while taking care of them who became stronger than himself, the adventurer I was spending my days thinking about "retirement" as a... In the midst of such a quest, one of his daughters Ange is poisoned by a monster! The only way to save Angers from the poison that even antidote magic doesn't work is to obtain the holy water that springs from the "Legendary Holy Sword" that is said to be stuck deep in the misty forest!! Tarei makes up his mind! For the sake of his beloved daughter, he goes to the Forest of the Sacred Swords alone, and then comes face to face with the Sacred Sword...!!?