After living through what was considered by most to be the Apocalypse, Emie Mercer realized that the games she'd been playing were nothing more than tutorials on how to live in a world where magic is real. A decade after being indentured in a new world, Emie manages to use her gifts with Time and Space magic to send herself back to the start - when she was first exposed to the energy that fuels magic. Finding herself further in the past than expected, Emie has more time to prepare for what is coming. Her second chance in a world of magic will start by seeing how well she can leverage her knowledge and the tools given to Earth in preparation for the changes to come.
It's too bad she didn't really pay attention the first time around.