Unraveling Time

In a story where time rules all, Y/n unconditionally travelled back in time and met the same person in many different timelines and different universes. Many different versions of him and many different encounters occur. And yet, she stood baffled at every single version. But as she realized an anonymous threat was befallen upon the man, and with the little time they had, the timeline continued to collapse. Will Y/N put back the pieces and unravel the origins of time?