"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

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.

For Amanda Seyfried, the Peacock limited series offered a rare opportunity to play a character adapted from a book while working closely alongside the author, Liz Moore.

The eight-episode adaptation of Liz Moore's novel tells a story of sisterhood, addiction and murder set in the Kensington neighborhood of Philadelphia.

Amanda Seyfried opens up about Peacock's "Long Bright River," her 40th birthday plans and what song she most wants to hear in "Mamma Mia 3."

Played by Amanda Seyfried, with a disconcerting intensity that echoes her Emmy-winning portrayal of fraudster Elizabeth Holmes in The Dropout, the protagonist of Peacock’s Long Bright River is a bright young woman and a talented English horn player.

NPR's Ari Shapiro talks with Amanda Seyfried, star of the new series Long Bright River. She plays a police officer investigating the murders of women from Philadelphia's Kensington neighborhood.