Introduction

A soulmate AU - what started as a meet-cute and an unlikely star-crossed lovers took a turn a terrible turn. Now Sam and Dean have to deal with an amnesiac woman with a soulmark and the Avengers have to deal with Steve. Hard to tell which is worse.

AKA:

In which Steve is forced to solve an unsolvable dilemma and inevitably fails, Natasha is nosy in her attempts to be a good friend and it backfires and Sam Wilson is too old for that $#*!.

Also, Castiel is picking up strays from Heaven, leaving them to Sam and Dean to deal with.

Needless to say, it's a mess, but when it looks like the God himself might be meddling, Team Free Will doesn't have a choice. It's not like they would just let the poor woman with amnesia wander off anyway.