This isn't the same thing but it's loosely inspired... It's 20 years instead of 10... I have no idea what the options r. does that count?
TW: 9/11
If only the span was 20 years! I could have an interesting tale.
I'm thinking... what if this takes place in January 2000. MC is told by a Time Traveler who actually
thanks MC and the world for making a better future (in this timeline, global warming was taken seriously after the Pandemic, and the earth made a crucial recovery), and then goes on about a 2020 Pandemic. MC is confused but knows it's probably real because Time Traveler (1) Obeys the laws of physics (2) Knows more about MC than they should (3) Specifically said we're too insignificant to change it, so they thanked the most useless person they could find (as in, the one who won't affect the timeline the most of the 7.3 billion people on earth). We never see Time Traveler again, at least not knowingly. Time Traveler likes abusing his 3054 power, I guess.
So over the next 2 years, they do something (... something?) to try and stop it. I still have no idea what it is yet. This IS a concept, after all.
Except for a year and a half in a certain, horrible situation that takes place with 9/11 and MC is questioning their sanity more than they already have... because something so terrible happened, and MC wasn't told a thing by Time Traveler.
What am I doing? I couldn't write this if I wanted to. 'Tis an idea, as all.