Saving Sencen: A Sokeefe/ kotlc fanfiction

Sophie Elizabeth Foster is the most powerful elf in the Lost Cities with over five special abilities.
But even she can't control everything. Stellarlune isn't the answer everyone has been chasing after - and even if it was, it couldn't stop what happened next that night.
Keefe Sencen was murdered by Lady Gisela, his own mother, sacrificing his life to save Sophie's. She feels broken and devastated for months, and pours her heart into trying to stop the Neverseen, bringing Gethen, Ruy, and a nameless Neverseen recruit to justice.
But in the end none of it could bring Keefe back, until one day she discovers a ancient book that will allow her to teleport her back in time, giving her a new chance to save Keefe's life. The only problem is: once she teleports back in time she loses her memory of Keefe's death and has no idea how to save him.
But she has to figure it out quick - because the clock is ticking, and she only has three chances to figure it out before Keefe Sencen is gone from her life forever....
....Is this the end?
No.
Lady Gisela is dying, with one piece of Keefe that he left behind: He commanded her to transform into a human. Gisela realizes it's only a matter of time before she dies - after all, humans can't live forever. So she hatches a plan that will either save her soul - or destroy the world.