Nigerian journalist Ruona Meyer investigates how cough syrup became the country's biggest drug crisis, with an estimated three million bottles of codeine-laced syrup consumed daily in the north alone. She goes undercover with a hidden camera to meet addicts, including her own relative, whose lives have been hollowed out by the syrup, then traces the supply back to the pharmaceutical companies making it. Employees at Emzor and Bioraj, two of Nigeria's biggest drug manufacturers, are filmed admitting to selling codeine syrup illegally in bulk, without prescriptions, straight into the black market. The film moves between rehab centers full of teenagers, street scenes of young men slumped from overdose, and boardroom-style confrontations where Meyer presents her evidence to company representatives. The investigation aired on BBC Africa Eye and led to Nigeria's government banning codeine-based cough syrup within days of release. It is journalism built for consequence, not just exposure, and the hidden-camera footage is the reason it landed as hard as it did.