One July afternoon in 2009, cable TV executive Diane Schuler drove for two miles on the wrong side of New York's Taconic State Parkway before a head-on collision took her life, as well as those of her daughter, three nieces, and the other vehicle's occupants. The results of the coroner's toxicology report were at odds with the stable wife and mother her friends knew. The events of that fateful day are here pieced together with medical and psychiatric experts' insights in a bid to explain what happened. 100 min. Standard; Soundtrack: English Dolby Digital mono.