Caramel Apple is a young stallion hoping to become a great chef in his future, and, being in a renown school for just the specifics of complex cooking and proper manners, he's sent on a temporary apprenticeship with one of the greatest ponies of all: Goldenware, the personal grand chef of the alicorn sisters.
Every single one of her apprentices always left after just one day with her, and they never explained why. As such, she is considered the most difficult pony to train under, and considering her position, she's rightfully difficult. Goldenware doesn't understand why they'd leave so early, though.