Seyfried plays Michaela “Mickey” Fitzpatrick, a Kensington patrol officer who discovers a string of murders in the neighborhood’s drug market. As Mickey attempts to locate the killer, and find her missing sister Kacey (Ashleigh Cummings), she confronts dark memories from her childhood spent in the neighborhood.

"We can see ourselves in each of these people, and that's the point of storytelling,” Seyfried tells PEOPLE of the show, now streaming on Peacock