Embers of Time

It tells the story of Severus Snape's sudden awakening of memories fifteen years in the future on the eve of the night Lily Potter was killed. With double wisdom and pain, he tried to tamper with fate to save the one he loved, but found himself trapped in a more cruel paradox: it was easy to save her life, but harder to win back her heart than to fight the Dark Lord. This is a soul war about atonement, obsession and letting go.