The damage done to the Potters and the other children of those who fought in the wars is so seldom handled. This was a brilliant way to examine that through Harry's eyes, a parent who was so broken that he couldn't see how he was damaging his family.
I love that you turned everything on end, and yet stayed true to canon, making yet another Slytherin (a Malfoy!) the one who tries to go to the authorities and expose what's happening.
And, seriously, congratulations on being able to tell that whole story through brief moments of the conversations between Severus and Harry.
The only part that left me a little confused was trying to figure out how Severus got from the Shrieking Shack to the time capsule. In the end though, it was just brief curiosity, because it didn't detract from my enjoyment of your story.