A foster mother is murdered, prompting an investigation by Cat and Leo. Before long, Cat is surprised by the bond she forms with one of the foster children. The case turns personal for Leo, who misses his own son in France. Meanwhile, Cat asks to open a case into a mafia family.

A female inmate escapes during an attack on a transport van who turns out to be the witness to the murder of Cat's father.

The wife of the Park Slope stalker is found dead, bringing Cat's buried emotions to the forefront; a shocking discovery is made