4 teenagers are sent back in time to 1976, where they must deal with the facts of the future and knowledge that they hold. One holds desires for a Slytherin doomed to death and wishes to save him, and the other three are hellbent on not changing anything.
An old friend of Severus' sends him a flower, and tells him never to forget. Tells him, to never forget the woman he loved, the woman who ended up sacrificing her own life for another.