Manhattan's exclusive East Side isn't a neighbourhood that NYPD detective April Woo and precinct captain Mike Sanchez associate with grisly crime scenes - until Maddy Wilson, wife of a celebrity chef, is found slashed to death in her fashionable town house. The obvious suspect is her longtime nanny, a woman whose questionable behavior is matched only be her penchant for lies.

Then Maddy's best friend is murdered. The suspect in that case? Another nanny. For April, the coincidence is too strange, the connection too neat, and the motives too tenuous. As the investigation unfolds so do the victims' privileged secrets. And each one of them cuts like a knife.