Absolution Never Comes

This is the story of Severus Snape, following him through his years at school and the trials of growing up an outcast, to finding a family among the Death Eaters, to his betrayal of the Dark Lord and ultimate turn towards the Light. Except with one difference... What if Lily wasn't the one Snape fell in love with? Snapecentric. Slash in the second half. Full summary inside.