Tainted

In a secret society hidden from those without the Sight, spirits stuck in purgatory roam the earth. In this society stands Madeline Knox, a human girl who doesn't have much going for her. That is, until an accidental run in with the Crossers. Without even realizing, they give Maddie the ability to see past the veil between the living and the dead. They give her the Sight. From there, she falls victim to a fragmented truth she was never meant to see.
Being thrown into their world, Maddie is caught in the middle of a life or death game put on by a notorious sociopath named Ayer Therrian, who has it out for her Crosser friends. Fending for herself, Maddie must adjust to the undead limbo she got herself mixed up in. It could cost her her life, and from what the Sight has shown her so far, it's becoming clear that death isn't as peaceful as anyone thought.