The year was 1981. The US was entering a deep recession, Russia was our enemy, and John Hinckley, Jr.'s assassination attempt on President Ronald Reagan shocked the nation. It was also the year author Andrea Kleine learned her close childhood friend had been violently murdered by her socialite mother, Leslie DeVeau. Both events took place in Washington, DC. Hinckley and Deveau were both sent to St. Elizabeth's hospital, guilty by reason of insanity. It was there that they met, and later became lovers.

These two real-life, and ultimately converging events inspired Kleine's jaw-dropping,...