'This is our story.
You don't know us, but we know you. We have eyes everywhere. We're smart. We're dangerous. We're coming for you. No one is safe. Not even ourselves. Everyone's a target. Try to stop us.'

Riley Thompson has been a detective for almost 30 years. Over the years he has seen a lot of grisly crimes. Nothing prepares him for a call he gets one rainy night to investigate a girl covered in blood walking down a dark highway, wearing what appears to be a prom dress.

Her name, she tells him, is Lindsay. Her real name, she says, is Siren. Detective Thompson is not prepared when he hears this girl's story.

When Siren is put on trial, claiming Jeffrey Dahmer is-or was-still alive, Detective Thompson is charged with sealing her fate and ensuring she goes to prison. But as Riley digs into this girl's background, he begins to doubt things. He learns things. Mostly, he doubts who he really was and learns who he really is.