Copenhagen arrived at the library one day with little memory of who she is, and she's been stuck here ever since. She takes to helping preserve the library alongside the wise mechanical creatures who tend to its care, but the longer she stays, the more she forgets. Unless she can find her memories, Copenhagen will cease to remember everything that makes her who she is.

But the library has been losing magic for quite some time, and with it, all the memories it holds. To save this wondrous place from ruin, Copenhagen will have to journey deeper into the library than she's ever ventured before, even if what she finds shatters everything she thought she knew.