SYNESTHESIA: A neurological condition characterized by automatic, involuntary sensory perceptions triggered by seemingly unrelated stimuli. There is something unusual about Dr. Jenna Ramey's brain, a rare perceptual quirk that punctuates her experiences with flashes of color. They are hard to explain: red can mean anger, or love, or strength. But she can use these spontaneous mental associations, understand and interpret them enough to help her read people and situations in ways others cannot. As an FBI forensic psychiatrist, she used it to profile and catch criminals. Years ago, she used it to save her own family from her charming, sociopathic mother. Now, the FBI has detained a mass murderer and called for Jenna's help. Upon interrogation she learns that, behind bars or not, he holds the power to harm more innocents—and is obsessed with gaining power over Jenna herself. He has a partner still on the loose. And Jenna's unique mind, with its strange and subtle perceptions, may be all that can prevent a terrifying reality...