Harriet is twelve-year-old girl who is scared of the Dark, and not just scared of the thought of what may, or may not lurk within the Darkness, but scared of Darkness itself. You see Harriet is a sorcerer of Light and she lives among a small colony of sorcerers who practice in the art of LightCraft - a form of magic that summons the power of Light. This colony keeps the Spirit of Darkness sealed away, banished within a shrine of Light which they locked him in after he devoured nearly all Light from the face of the earth, and although these sorcerers are kind, gentle people, they cannot accept Harriet as one of their own. However, when the Protector of Light trials go horribly wrong, the Spirit of Darkness attacks them and Harriet unknowingly transforms into a winged, angelic figure made up entirely of Light and saves everyone. Now the sorcerers must act fast to reinforce the shrine and banish the corrupt Spirit of Darkness away once more, before he engulfs their entire world in Darkness.