Cold, Brilliant, and Utterly Still

Ivy Selwyn's life under the dictation of pureblood society is manageable. That is, until the summer between her 1st and 2nd year at Hogwarts. When something horrific happens to her younger sister, Hazel, Ivy's whole reality fractures into dust. As she becomes closer with Regulus Black, she begins to figure out how to take down Voldemort and his ideals from the inside.