The plan for this is basically a ridiculously sad Anderperry (Todd Anderson x Neil Perry) fic. So yeah, don't read at a family dinner if you don't want to sob.
Decades ago, Tom Riddle was a Ghostface killer at Hogwarts. Four students dead - one Gryffindor, one Slytherin, one Ravenclaw, and one Hufflepuff - in four weeks. Now, in 1995, the killings are starting up again by a copycat killer. Will they be able to solve who the Ghostface killer is before all four of them die?