The Princess Castle is a direct to video film, produced by Golden Films. It's about two sisters who travel to a magical kingdom where they have to rescue a queen named Emma from her evil twin sister.
One day Claire is looking after her little sister Caitlin when the two sisters find a secret door under the stairs. Inside, Claire and Caitlin find an enchanted trunk, a magical locket and an invitation that whisks them away to a magical kingdom. There they meet a young boy named Antony, the son of Queen Emma. They discover that evil Queen Carlotta is looking for the magical locket, and when Caitlin is captured by The Queen, Claire and Anthony must disguise themselves to save Caitlin, and the Kingdom from Carlotta’s evil spell!