Help?So the time travel/dimension travel au tag on AO3 exploded because of IW and sorting through it…

Help?

So the time travel/dimension travel au tag on AO3 exploded because of IW and sorting through it now is a nightmare. I can’t for the life of me remember the title of the fic I am looking for. I think it is between two and four months old maybe(?)

Steve and Tony fall through time/dimensions and all I can remember that would really define this fic is a tall tower and a man living in it who helps them. I honestly don’t remember if it is a soulmate fic or not. 

I know it isn’t much to go on but I really, really, really want to re-read it. If anyone has a clue what I am babbling on about, could they maybe point me in the right direction?

Thanks

~West