"Equoid" is a short story by Charles Stross that blends elements of fantasy and horror within a narrative featuring a unique twist on the classic mythos of unicorns. In this story, unicorns are depicted not as innocent creatures but as dangerous beings with lethal consequences for those who encounter them. The protagonist, a private investigator named Bob, is drawn into a dangerous situation when he is asked to deal with a unicorn problem that threatens a wealthy individual.
The story delves into themes of reality versus myth, exploring how the perception of magical beings can be drastically altered by the truth behind them. Stross effectively uses humor and horror to create a gripping atmosphere, as the investigator uncovers the dark side of unicorns. Through this lens, the narrative prompts readers to question the boundaries between the fantastical and the mundane.