Dead Boy Detectives (2013) #5

Back at her parents' swanky house, after causing the destruction at St. Hilarion's, Crystal bonds with Charles over a high tech investigation of his mysterious family history. Feeling distinctly unwanted, Edwin huffs off to begin his very own investigation - of the spooky, cat-infested house across the way. What he finds there is a portal into his own past that will turn his whole world upside-down.