A new species of predatory plants, called Triffids, roam civilization's ruins after most of the world's population is blinded, the after effects of a strange meteor shower. A few survivors must fight to survive evading the Triffids which have taken advantage of humanity's misfortune and have begun feasting on human flesh. The movie manages to maintain some level of credulity until the end with its prepostorous conclusion and its revelation of a solution to the Triffid infestation.
