When Voldemort returned in 1995, he created a rift, or hole in what separates the dead from the living, and keeps the dead from returning.
Now, when Harry came back, though he didn't technically die, he still reached that in between place where he spoke to Albus Dumbledore in the flesh. Unknowingly, he finished what the Dark Lord had started. He ripped the hole wide open, allowing those spirits -who were pure of heart- to return once more.
A/N: To be entirely honest, I really have no idea where I will go with this, or if I will even write more than two more chapters. Just so you know. Do not get your hopes up.
"Regulus didn't see him again until the holidays were over and his parents acted as if they had only ever had one son."
Regulus Black has been told his entire life that he should be proud of who he is and the family he comes from, but with a rebellious brother like Sirius, he isn't sure if he really believes them. When his eyes are finally opened to the horrors he's been forced in front of, he wonders if this is really what life is meant to be.
In which Regulus Black survives the cave.