Trick 'r Treat is a 2007 movie about four intertwined stories that take place on Halloween night. The stories are about a high school principal who has a terrible secret, a college virgin who meets a mysterious stranger, a group of kids who go out to collect candies, and a cantankerous old man who finds out there's more to Halloween than meets the eye. With a mix of science fiction and horror, Trick 'r Treat is a movie that will leave you scared and on the edge of your seat.