In August 1966, two electronics technicians walked up a rainy hill in Brazil wearing formal suits, heavy plastic raincoats, and crude handmade lead masks over their eyes.
Beside their bodies, police found a mysterious notebook with strict, timed instructions:
"16:30 be at the agreed location. 18:30 swallow capsules... wait for mask signal."
There were no signs of violence, no struggle, and no missing money. After decades of police and forensic investigation, one question remains: What were they waiting for, and what killed them?
In this documentary, we dive deep into the full timeline, the evidence, and the horrifying theories behind The Lead Masks Case—one of history's most baffling unsolved true mysteries.
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