On a summer day in 2013, psychologist Steven Kurtz is preparing one of his clients, Maria, for a therapy session. A calm, cheerful woman with long, dark hair, Maria has been in training at the Child Mind Institute in New York City with her six-year-old son, Ryan (not his real name), for months to ready him for this day. Her goal seems simple: to coax Ryan to obey a simple command. But Ryan does not take direction well.