Synopsis
Act One
It is the wedding day of Semele, the daughter of Cadmus, King of Thebes, and many citizens gather to take part in the ceremony. A priest performs a formal rite in honor of Juno, goddess of marriages and wife of Jupiter. Juno looks favorably upon the union and gives her blessing in the form of several auspicious omens. Yet Semele remains emotionally detached from the joyous event, and neither the pleading of her father nor that of her fiancé Athamas can convince her to join the celebration. For she has fallen in love with the god Jupiter, commonly called Jove, and cannot reconcile her passion for an immortal with her worldly duties to father and society. After Semele privately ponders the situation, comparing her own sighs to the song of the lark, her sister Ino gives public voice to her own suppressed torment. Cadmus seeks to discover the cause of her woe, just as Semele and Athamas each offer consolation in their own way, but Ino feels it useless to disclose the truth: that she secretly loves Athamas. Suddenly a roll of thunder is heard, announcing Jove’s anger and opposition to the marriage. There is a struggle for control of the sacrificial flame to the goddess Juno, but eventually the fires are extinguished on the altar, a sign that Jupiter dissents and may punish those who participate in the ceremony. The crowd flees in fear, leaving Athamas and Ino alone. Though they disclose a mutual, hidden passion for one another, both are aware that their wishes cannot be realized in the shadow of Cadmus. The king returns and announces the upsetting effect of a divine intervention: Semele has been carried off by Jupiter in the form of an eagle and transported to his realm, where she enjoys endless pleasure and endless love.
Juno, also known as Saturnia, is angry with her husband Jupiter for yet another of his typical dalliances with mortal women, and she vows to find Semele and to destroy their happiness. To this end, Juno confers with the goddess Iris, who has returned from an exhaustive search for the hiding place where Jove keeps his mistress. Iris describes their love nest and the obstacles that block access from the outside: large stone gates and dragons that would cause even a god to fear. Juno hatches a plan to surmount these barriers with the help of Somnus, the god of sleep, and quickly departs with Iris to find him. Meanwhile, in her hidden retreat, Semele complains as she wakes to discover herself ignored by Jupiter and wishes she could return to the comforting delusions of sleep and dreams. When Jupiter joins his lover, she relates her loneliness and longing, and at first he attempts to assuage her concerns with empty promises of fidelity. Because she yearns for attention, Semele takes some assurance from his pledge that even in physical absence, he remains with her in the form of Love and Desire. Yet as a mortal with human emotions, Semele cannot fully stifle the pain and fear she experiences without Jupiter. The god begins to wonder whether his mistress has designs on immortality. Jupiter invites Semele to enjoy the pastoral beauties around her, yet for all the delights of the natural world, she remains restless and unsettled.
Act Two
Juno and Iris attempt to recruit Somnus to help break up the love affair between Jupiter and Semele, but true to form, the god of sleep is too tired to care. However, when Juno promises to grant him love with Pasithea, a nymph previously ravished by Jupiter in the form of a bull, Somnus wakes with lust and vitality. Juno bribes him to manipulate sleep in three ways: to sink Jupiter into a lustful dream of Semele, so he will wake and grant her any wish; to give Juno his leaden rod, so she may subdue the gods and enter Jupiter’s retreat; and to force Ino into slumber, so Juno can disguise herself as Semele’s sister. When Juno meets Semele, the divine camouflage works, and the goddess instantly gains the girl’s confidence. Juno (as Ino) innocently asks whether Semele has been granted immortality, knowing that the question will stir up enduring unhappiness. To further entice her, Juno (as Ino) offers a mirror to Semele and invites her to gaze at her own face, already transformed to the perfection of a goddess. When Juno (as Ino) suggests an opportunity for Semele to attain the status of a god, she falls into the trap and asks for the details. Semele is led to believe that if Jupiter appears before her in his unmasked, godlike form instead of first transforming himself into the shape of a man, she will become immortal as well. Semele thanks Ino (really Juno) for the advice and promises to pursue it. Jupiter returns to Semele and expects her to embrace him without delay, but she hesitates and complains that he never grants any of her requests, although she gives him everything. Jupiter swears an oath to fulfill any desire, and Semele asks that he appear to her unconcealed, in his natural form as Jove. Realizing too late he’s made a rash promise, Jupiter rebukes himself, for he knows that Semele cannot survive such a revelation. Misled and blind to her own safety, Semele refuses to take back her request, while Juno celebrates the impending doom and her own triumph. Jupiter appears in his godlike form, unable to prevent the death of Semele, as Cadmus, Athamas, and Ino observe, all equally powerless. Those who witness the immolation respond with terror and seek to find a meaning for the loss: that overwhelmed by the allure of power and celebrity, we lose sight of ourselves, and in so doing, perish.

