Betty Boop's 43rd cartoon opens in the palace of the vain and wicked Queen, who of course is engaged in her favorite pastime -- asking her mirror who is the fairest in the land. Betty arrives at the Palace, guarded by Koko and Bimbo, and asks to see her stepmother, the Queen. Displeased that someone fairer than she has arrived, she tells Koko and Bimbo to dispose of her. The two tie her to a tree while they sharpen their instruments, but Betty escapes. Unfortunately, she slides down a snowy hill into a frozen pond and emerges encased in ice. Her icy "coffin" is found by seven dwarfs, who carry it into a mysterious cave. The Queen discovers Betty is still alive, transforms herself into a hag, and then transforms Koko into a strange, morphing figure that sings (to Cab Calloway's voice) "St. James Infirmary Blues." Spooky figures punctuate the lyrics as he sings and he moves into the mysterious cave; at the end of the song, the haggish Queen freezes all present, and resumes her normal form. But when she asks the mirror her question, the mirror somehow turns her into a dragon, while at the same time unfreezing the other characters. Bimbo eventually saves them from the dragon by turning it inside out, and all are safe and happy.