When a series of bizarre deaths rock San Francisco, homicide detective Frost Easton discovers a connection that leads him to psychiatrist Francesca Stein. Dr. Stein's controversial therapy helps people erase their most terrifying memories -- and all of the victims were her patients. As Frost and Dr. Stein carry out their investigation, the case becomes increasingly personal -- and dangerous. Long-submerged secrets surface as someone called the Night Bird taunts the pair with cryptic messages pertaining to the deaths. As the body count rises and the Night Bird circles ever closer, a dedicated cop and a brilliant doctor race to solve the puzzle before a cunning killer claims another victim.