Imagine everyone's surprise when Carter von Oehson, a sophomore in Dr. Dylan Reinhart's Abnormal Psychology class, posts on Instagram that he plans to kill himself. Twenty-four hours later and still no one has seen him. The one person convinced he's still alive is his father, Mathias von Oehson. But what Mathias knows and how he knows it would ultimately reveal a secret so damaging that it would be as if he were committing suicide himself. Dylan now...

A tenacious Manhattan police officer determined to stop a serial killer who leaves playing cards at the scenes of unrelated victims teams up with a brilliant professor whose book has been connected to the murders against a backdrop of high-profile tabloid speculation.