LSD begins as an accident in Albert Hofmann's Sandoz laboratory in 1938, synthesized from ergotamine and shelved for five years until Hofmann re-tests it in 1943 and cycles home on his bicycle mid-trip. The film traces the drug from that lab bench through its 1947 release as Delysid, a Sandoz pharmaceutical marketed for psychiatric use, into the CIA's MKULTRA program, where agents dosed servicemen and students while hunting for a mind-control application. From there it follows LSD into 1960s youth culture, where recreational use spreads fast enough to trigger a political backlash and, eventually, outright prohibition. Archival material and expert testimony lay out what the drug actually does at the pharmacological level, its extremely low toxicity relative to dose, its non-addictive profile, and the rare but real psychiatric risks like anxiety and delusion. The film closes on the present-day research revival, with organizations such as MAPS and the Beckley Foundation funding new clinical work into LSD's therapeutic and spiritual uses after decades of legal freeze.