"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 navigates a world filled with danger and uncertainty. The novel features the Triffids, dangerous, mobile plants that can kill with their stingers. With the majority of people unable to see, the Triffids become a significant threat. The book explores themes of survival, human nature, and the consequences of scientific experimentation.