Prologue: The Cloaked Man

Just an idea I had. Robin had sacrificed himself to stop Grima. As a result he left everyone he cared about behind. Its been three years since and the Shepards haven't given up on him. But one day Chrom and Sumia are transported to a strange world. Once there they find someone that they have been looking for. My first Fire Emblem story. Sorry if I get somethings wrong in advance.
Rated M for some use of cursing and strong language.