This ecological dystopia by Richard Fleischer, sees an overpopulated New York in 2022, struggling with the increasing scarcity of natural resources. Detective Thorn (Charlton Heston) is investigating the murder of a businessman with ties to the Soylent food corporation, which came up with a solution to feed the teaming masses, Soylent Green, a product allegedly made from plankton. But the truth behind it lies behind horrendous secrets that Thorn’s investigation will reveal.