"The Day of the Triffids" is a science fiction novel written by John Wyndham, first published in 1951. The story follows a man named Bill Masen, who wakes up in a hospital to find that most of humanity has been blinded by a mysterious comet shower. As society collapses, he discovers that deadly plants called Triffids, which can walk and have a venomous sting, are now free to roam and attack the remaining sighted people. The novel explores themes of survival, human nature, and the consequences of scientific experimentation. As Bill navigates this new world, he encounters other survivors and faces the challenges posed by both the Triffids and the breakdown of civilization.