1920s. New York City. When a second immigrant woman turns up murdered in the Lower East Side, Ava Gold, the city's first female detective, is summoned to crack the case. But this serial killer is savage, and Ava's dangerous game of cat and mouse may just lead her too close to home. In the rough streets of 1920s New York City, 34 year-old Ava Gold, a widower and single mom, claws her way up to become the first female homicide detective in her NYPD precinct. She is as tough as they come, and willing to hold her own in a man's world. Ava fights an uphill battle to get her precinct to take the murder of an immigrant woman seriously. But Ava refuses to give up, and when the case leads only to dead ends, she's forced to take matters into her own hands Could her own husband's murderer hold the secret to cracking the case open? And if he does-can Ava delve into her own past and catch the killer in time without being pushed to the edge?