'Angels Sing to Rest' begins where 'Darkness Knows Me' left off: after the investigation into the death of the Deep Ellum Killer, Levi Devereux.
Detective Sergeant Olivia Gates returns from a two month suspension, to find her team has gained a new member, her ex-husband has been released from prison, and a 10 year old street kid has been murdered on her patch of South Dallas. Her ex she thinks she can deal with, even when he drags their young son into the mix. The murdered boy with the crushed chest, isn't so easily handled and weighs heavily on her as more street kids are killed with an unimaginable sadistic flare and no discernible motive.
If the continuing body count wasn't stressful enough, Olivia's falling out with long time friend and colleague, Doctor Will Green, threatens any hope Olivia had for more than a friendship with the good doctor.
Drugs, gaming, prostitution and sadistic murders lead Gates and her team on a trek through the seamy underbelly of living rough on the streets of downtown Dallas.