After Voldemort disappeared, Death Eater Barty Crouch Jr. Escaped the capture of Aurors with the help of his father's invisibility cloak. Not long after, in court, he met Marlene McKinnon, the little girl who survived the McKinnon family tragedy.
As the youngest daughter of the McKinnon family wallows in grief, she meets her hero, Barty Crouch Jr., Who turns out to be a Death Eater.
Concept: A young former Death Eater meets the daughter of a sacrificed Auror?