Manhattan's Upper East Side isn't a neighbourhood that NYPD detective April Woo and Precinct Captain Mike Sanchez associate with grisly crimes - until the wife of a celebrity chef is slashed to death in her fashionable townhouse. The obvious suspect is her long-time nanny. Then the victim's best friend is murdered as well. The suspect in the case - the nanny. As April's investigation unfolds, so do the victims' privileged secrets...and each one of them cuts like a knife.