Every Two Years

What's an easy way to make money for a decent looking homeless teen in New Orleans?
Find rich tourists, bring them back to a hotel room, and pretend to be terrified when a few thugs bust in and rob them while they're naked and scared. Then you take your cut and have food for the week.
But this time it was different. This time, Nat's mark has already marked her.
What starts as an innocent setup, turns into her being kidnapped by Louisiana's most wanted serial killer.
The Mass Grave Killer.
She finds herself locked in a basement with nine other teenagers and only two years to escape before he buries her.
And escape she does, taking her kidnapper's life.
Or so she thought.
Two years after her harrowing escape, while she's finally getting her life back together and only looking over her shoulder half of the time, the police find a fresh mass grave and a letter just for her.
"I'm back. I'm coming for you."