Kogoro is hired by three different clients to perform the same job: protect the racing horse White Spirits. Conan believes there's more to these requests than meets the eye. Later, Kogoro meets with company president and owner of the horse Tokuyoshi to explain the situation. After hearing his story, Tokuyoshi also hires Kogoro to perform the same job. The next day, White Spirits is transported by trailer to the track in order to race, but... when the trailer arrives, the horse that comes out of it is a different horse that looks a lot like White Spirits...
