The Day of the Triffids, post-apocalyptic science fiction novel that was created by English science fiction writer John Wyndham and published in 1951. Though it initially received only moderate acclaim, The Day of the Triffids later became a science fiction classic (as well as a low-budget movie in 1963) and a defining novel of the post-disaster genre.
The novel is set in London in a world which has become dependent on the oil produced by the recently introduced triffid plant. Triffids, however, can grow to a height of 7 feet (2.1 m), can walk on their roots, are carnivorous, and possess a lethal stinger. The action opens with biologist Bill Masen in the hospital, bandages draped over his eyes as he recovers after a triffid sting. It is the morning after the most spectacular meteorite shower the world has ever seen, but Masen discovers that the meteor shower blinded everyone who saw it. He meets Josella, another sighted survivor. Seeing a light atop the Senate House at the University of London, the pair go there and find a group of sighted people, headed by the Colonel and Michael Beadley, who plan to collect food, leave London, and begin a new society. The next day, though, a gang led by Wilfrid Coker breaks in and kidnaps sighted people, including Masen and Josella. Each sighted person is assigned a district of London and a group of blind people, and they are to survive by looting. Soon, however, a mysterious illness begins decimating the surviving population, and everyone is under attack by triffids.
Masen tries in vain to locate Josella and then returns to the Senate House, where he sees an address in Wiltshire written on a wall. He then encounters Coker, and the two take trucks and head to Wiltshire. where they find a splinter cell of Beadley’s group. Coker remains there, and Masen leaves, still searching for Josella. On his journey he finds a 10-year-old sighted girl named Susan who has lost her family to triffids, and he takes her with him. He finds Josella living in a house that she had told him about, together with the blind owners and another blind friend. Later Masen learns that the group in Wiltshire have all perished. Years pass, as Masen and Josella and the others survive by stealing food and fuel and fighting off the triffids.
One day a helicopter arrives with news that Beadley has set up a community on the Isle of Wight, from which they have eradicated triffids. After another dramatic escape from another would-be dictator, Masen and Josella escape to safety on the Isle of Wight.
On the face of it, The Day of the Triffids seems to be a reasonably straightforward survival adventure, but it was the first of its time to anticipate disaster on a global scale. Wyndham predicts the technologies of biowarfare and mass destruction, offering a sophisticated account of Cold War anxiety that was well before its time in terms of its exploration of the psyche of individuals in the face of overwhelming social change.