The Day of the Triffids

All humans eat vegetables. But what if we were the helpless ones, and the plants were eating us? Following the Earth's close encounter with a comet, a meteor shower strikes Britain's population blind. Bill Masen, recovering in a London hospital from a vicious plant attack, is one of only a few people to survive with his eyesight intact. But the world he emerges to has altered terrifyingly into a nightmare where man-eating plants -- the triffids -- are gathering in force! (official distributor synopsis)