At the age of ten, individuals are granted two skills by a being known as God.

The skills granted to Rino, a girl aspiring to be an adventurer, were [Evasion], which automatically dodges attacks, and [Storage], which allows her to freely store and retrieve items.

As neither skill was suited for combat, she remained unable to become an adventurer, spending her days in frustration as a mere porter.

However, her destiny takes a dramatic turn when she joins an evil dragon subjugation party as a porter.

In the deepest part of a dragon-infested dungeon, Rino is abandoned by the hero. There, she acquires a necklace containing the sealed spirit of Raina, the strongest Dragonslayer, thus gaining the power to fight.

Housing two souls within one body, the girl rises as an adventurer while simultaneously becoming a Dragonslayer who hunts the Dragon-folk that assume human forms and prey on humanity.

This is the story of a girl who will one day be known as the Dragon-slaying Hero.