Fentanyl has become the leading drug fueling the overdose epidemic in St. Louis. Odorless and tasteless, even a small amount can be fatal, and it has permeated every aspect of society — from the cities to the suburbs, affecting people across all demographics, regardless of wealth, race, or background. Many individuals who fall victim to its grip are unaware they’re even consuming it, contributing to a rapid escalation of addiction in the region. Today, fentanyl is involved in over 70% of overdose deaths in St. Louis. After months of investigation, this story is told through the voices of recovering addicts, advocates for change, and those left to cope with the aftermath.