1970s San Francisco: the sights, the sounds, the serial killers.

As the ’70s draw to a close in San Francisco, things do not bode well for the city --- or for ex-con PI Colleen Hayes, whose daughter Pam, in a tragic turn of events, has lost her baby. Pam leaves San Francisco, and Colleen, who moved there to reunite with her, starts to wonder what she’s doing in the Bay Area.

Meanwhile, a serial killer given the name “Night Candy” is targeting sex workers, both male and female. The situation doesn’t improve when Colleen’s friend and ally --- SFPD Inspector Owens --- is arrested for the murder of his ex-wife, who was found burned in a fire the same night the pair had tried to rekindle their love. Could Owens have really done what they say? Even Colleen has her doubts.

But there are people depending on her: Owens, who needs help finding his ex-wife’s real killer, and a trio of sex workers Colleen keeps her eye on --- especially with Night Candy on the loose. Then, one of the three girls is next to disappear. If anything is to test Colleen’s resolve, December 1979 seems to be it.