The Vampire Mourned

With his wife Helen fallen into a mysterious coma, and the other vampires unable to determine why, Will has never felt more alone in his life.  Becoming more and more desperate for answers, his searches come up with nothing but the start of a mysterious note.  Coupled with vivid and disturbing dreams, the unfinished note begins to paint a horrifying picture. 

What happened to Helen exactly?  What is Will supposed to do to help?

And who exactly is Ind?