Starshine Legacy Episode 3: Legend of Pandoria (2005)

The main character in the third episode is Anne, who is very interested in fashion. She is trying to win a competition for a modelling contract with the perfume company Glamour No.5, but has some trouble with fellow competitor Jessica. She convinces the photographer Derek to join her at the Jorvik Stables to shoot her with her dressage horse Concorde. However, the presence of both Jessica and Mr. Sands seems to make Concorde sick and he collapses, when Jessica is taking a photo with him. Nobody knows what the problem is and Lisa advises Anne to seek help from Fripp. Fripp explains that Concorde's soul is in Pandoria, and that Anne needs to go to the other dimension to retrieve him. She succeeds and together they flee back to the stables, where she meets up with the other Soul Riders and Derek. There they find out that Derek isn't the one he said he was and in the end, Anne has to ride to Dark Core's platform and stop Mr. Sands and Jessica.