A drama set in the world of horse racing focusing on lives of owners, jockeys, trainers and gamblers who are all tied to the same horse track.

Mal Ja who is a part-time worker at a PR company loves all living creatures, but she has experienced a trauma with horses.

The star horse of Neko Jockey is Mannen Billy, a prize racer who has lost 30 races in a row despite having an excellent physique and bloodline. To solve the problem, the horse's owner hires a brand new jockey... who, as far as Mannen Billy's trainer can see, is just a normal cat.