A lone, non-human being wanders through the night in London.
One evening, he stumbles upon a young girl named Letty, her voice cutting through the fog as she cries for help.
After rescuing her from the darkness, he discovers that she has lost her memories and has no recollection of how or why she ended up there. As they spend time together, the two form a friendship.
Determined to help the first friend he has ever made, the non-human, Sol, embarks on a journey to find “The Thorn Mage,” Elias, and Chise—figures whispered about in fairy tales—in hopes of restoring Letty’s lost memories.
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