Two back-to-back murders appear to be an escalation in the pattern. A non-profit examines the cases and starts to connect the dots, leading to a terrifying conclusion. Then, a break in one of the cases, years in the making, ends in an unexpected way.

As possible connections between the murders finally gets air time, the community rises up. But analysis of victimology leads outside experts to a grim conclusion: Chicago could be in the clutches of something far more insidious than anyone knows.

In Chicago, an alarming number of unsolved strangulations of mostly Black women has the community on edge. Police say they have not connected the cases, but activists and family members believe something sinister is haunting their city.