Perfect Pace is a famous detective in old England. Respected, posh, top of his class. Having solved more mysteries than any other pony in The Station.
When a mysterious killer is on a violent bloody rampage, he expects he'll be put on the case, a quick easy solve. What happens is anything but. When Chief, the head of police gives the investigation to a rookie detective, he assigns Pace to be a sort of babysitter, steer the young new comer in the right direction, training him to be his successor, but Pace has other ideas. As it turns out, the killer does also.