This is the 4th part of a new Pony-girl story. The twelve girls in the Latvian group soon discover that they have been totally misled. They paid €8000 to secure a job in the UK; and instead find themselves imprisoned in a special facility for transforming girls into submissives of one nature, or another. The clothing is scanty, the rules are arbitrary and the punishments harsh.
Ingrid is finally taken out for her first run on the track and is horrified at having to wear uncomfortable Pony tack and run in severe weather conditions. Anna and Hanna, fellow teammates, fall out and are harshly punished for making trouble, while Edvin Krols hovers close by. The handsome Latvian has taken a shine to Anna and takes the opportunity to give her another medical.
Meanwhile in England, Bronwyn is regretting joining the club and signing up to be a Pony-girl one weekend in six. Greg and Salim are so impressed with her athletic body, they begin to consider making her a full time Pony-girl. Henrietta upsets Greg, who promptly makes an example of her by fitting her with one of the new, experimental collars. This is part Four of a series. Because of its explicit content, this novel is only suitable for mature adults over the age of 18.