"The Birthday of the Infanta" is about a hunchbacked dwarf, found in the woods by courtiers of the King of Spain. The hunchback's father sells him to the palace for the amusement of the king's daughter, the Infanta, on her twelfth birthday.

Her birthday is the only time she is allowed to mingle with other children, and she much enjoys the many festivities arranged to mark it, especially the Dwarf's performance. He dances, as he did in the woods, thoroughly unaware of his audience's laughing at him. She insists on his performing a second time for her after dinner.

The Dwarf mistakenly believes that the Infanta must love him, and tries to find her, passing through a garden where the flowers, sundial, and fish ridicule him, but birds and lizards do not. He finds his way inside the palace, and searches through rooms hoping to find the Infanta, but finding them all devoid of life.