Chapter 1: Seven teens takes a case in a mysterious village

I've read a few crossovers of Detective Conan/Case Closed & Higurashi and I've decided to write my own. It was told that every citizens of the little town died due to a horrible gas exposing accident, and no one ever lives there anymore. But somehow there are people who living there alive and well. Can our favorite geniuses figure out the secrects of Hinamizawa, without getting cought in the web?
There will be blood & gore.