You are a drifter with special skills and powers, s.h.i.e.l.d has been trying to get you to work for them for years even though you are (age) years old, you are something special, even if you don't know it yet. S.h.i.e.l.d informs Tony Stark about you, to try and recruit you, and get some top secret information from you. You end up making a deal with Stark. While the dead continues he starts to take a liking to you.