Syd Burnett has left her complicated past behind to become an LAPD detective. Paired with a new partner, Nancy McKenna, a working mom with an equally complex past, Syd is pushed to examine whether her unapologetic lifestyle might be masking a greater personal secret. These two women don't agree on much, but they find common ground when it comes to taking on the most dangerous criminals in Los Angeles.
Tommy Egan leaves New York behind and plans to take on Chicago, using his outsider status to break all the local rules and rewrite them on his quest to become the biggest drug dealer in the city.
FBI agent Alice Black is on the hunt for a mysterious and calculating female serial killer. Both walk their own paths toward justice, and as their lives start to intertwine, the line between right and wrong begins to blur.
A veteran beat cop and teenage girl fall to their deaths from a tower block in south-east London, leaving a five-year-old boy and rookie police officer Lizzie Griffiths on the roof, only for them to go missing. Detective Sergeant Sarah Collins is drafted in to investigate, working to find Lizzie before she comes to serious harm, but also to uncover the truth behind the grisly tower block deaths.