Cuckoo in the Nest

What secrets lie within? I've moved into a shared house. My three new housemates aren't just reserved, there's a distinct chill in the air, an unspoken tension that makes me uneasy. I'm not here to make friends, though. I have my own secrets. Nikki is like a sister to me and I'm here to find out what happened to her. Where is she? I'm convinced someone knows more than they're letting on. Is she simply missing? Or has something far more sinister occurred within these walls? I'm not leaving until I find out if Nikki is alive or dead.