Researching material for a new novel, Charles engages Madame Arcati, a spiritual medium of uncertain talent, to conduct a séance in his home. Quite by accident, she summons the spirit of Charles's first wife and cannot make the disruptive spirit go away.

In cases ripped from the headlines, police investigate serious and often deadly crimes, weighing the evidence and questioning the suspects until someone is taken into custody. The district attorney's office then builds a case to convict the perpetrator by proving the person guilty beyond a reasonable doubt. Working together, these expert teams navigate all sides of the complex criminal justice system to make New York a safer place.