A psychological thriller set in Manhattan in the summer of 1979, when a young man is arrested for a shocking crime—and an unlikely investigator must solve the mystery behind it.

A couple hires a live-in nanny to watch the offspring while they work. At first, everything goes perfectly, but when an unsafe incident means the parents no longer want the nanny around, they find out this nanny is savvy at not being evicted from her live-in situation. So savvy, in fact, that she can make these parents' lives a true nightmare.