Lake Griffin, Florida, becomes a crime scene for wildlife biologists in the 1990s when American alligators, some up to fifteen feet long, start drowning by the hundreds. Footage shows animals thrashing in circles, dragging paralyzed hind legs onto the bank, or floating belly up, unable to right themselves. A team from the state Fisheries Department traces the die-off to heavy metal contamination in the lake's food chain, which they link to a breakdown in the alligators' vitamin B production and a small area of brain degeneration that leaves them unable to swim. The film follows the investigators piecing together water samples, tissue tests, and behavioral observations to reach that diagnosis. It then extends the finding outward, arguing that the same kinds of synthetic chemicals, heavy metals, and processed food inputs entering human diets and bloodstreams could be doing comparable damage to human physiology, framing the alligators as an early warning sign rather than an isolated case.