Dr. Cathy Moreland is taken aback when an irate patient comes to her practice claiming his ailing wife has been kidnapped by one of her colleagues using a false name. Is someone impersonating a doctor, or is Adam Steer delusional?

After looking into Adam's claims, she feels reassured that no such thing actually happened--but continues to worry that Steer is mentally unwell. A visit to his home only leads to more alarm. No one answers the door, but Cathy overhears a conversation that convinces her something sinister is going on--and that she herself may be in danger.

Cathy's own bipolar disorder is well-managed, but she's beginning to doubt her own sanity--and others are, too. As strange developments unfold, will she be able to make any sense of the events around her before everything spirals out of control?