Nell Barber, an expelled PhD candidate in biological science, is exploring the fine line between poison and antidote, working alone to set a speed record for the detoxification of poisonous plants. Her mentor, Dr. Joan Kallas, is the hero of Nell's heart. Eventually, the two scientists are tangled together at the center of a web of illicit relationships, grudges, and obsessions. A breathtaking and hypnotic novel about poison, antidotes, and obsessive love.