The Sixth Precinct's search for the killer of a fellow officer is derailed as Annie Reilly creates a rift in the Corcoran home. Meanwhile, Madame Eva Heissen – attempting to preserve a secret she has carried for months – discovers an unlikely ally in General Brendan Donovan. Elizabeth Morehouse soothes her troubled conscience by aiding the Freemans in their quest for Sara's mother and Francis Maguire finds himself crossing paths with his old friends – to surprising results.