IDEA HELP PLEASE!!!!

[Mewmewchan]

Hey, I have an idea for an original fan fiction and want to throw my idea out there and see if anyone has any suggestions before I actually start trying to write it all out. So, here is a brief synopsis: NOTE: this will be ranging from semi-explicit to explicit.
Title: Shadow Hill
Lucy Hartman has been living on her own for three years since her father's death and her mother walked out of her life five years ago. And she doesn't mind it. But, one night a mysterious stranger shows up at her door, bleeding with no memory and she allows him to stay the night. However, as time goes by Lucy begins to have strange, terrifying dreams that are connected to the stranger, and in her waking hours she feels herself drawn to him, wanting him...

Any ideas about who/what the stranger should be?
Any basic ideas about what should happen?

[Erethzium]

Moved to D-PAW, as it doesn't really fit in the Author's Domain.

EDIT: Actually...you posted the same thread in this forum too? One of these needs to be deleted, then. No need to have two of the same topic.

[Mewmewchan]

I did move, I just don't know how to delete this one. Sorry.

[UnknownH]

Done. Discuss here.

[Frisk E. Coyote]

Hmm... Her secret twin brother raised separately from her by her mother?

...Incest? :3