Merriman and Tulip are back on the throne, just in time for the annual Hallowtide party. Patrick is tasked with chaperoning Princess Blossom, but his desire to hang out with the knights at the party leads him to abandon his duties. Meanwhile, Blossom... (more) plays a “Bloody Mary” game in a mirror, and swaps places with her deceased Aunt Donna, who runs amok at the party. Now Patrick must help Blossom escape the mirror by midnight, or she’ll be trapped there forever!