The bogus astrologer, Ecclitico, wants to trick the protective Buonafede into allowing his daughters Clarice and Flaminia, and their maid Lisetta, to marry the husbands they choose, Ecclitico, the cavalier Ernesto and his servant Cecco respectively. Buonafede is drugged and taken into Ecclitico’s garden. In his drugged state, Buonafede thinks the garden is the moon. Cecco, Ernesto and the girls also come to the garden. Buonafede sees Cecco as Emperor and Ernesto as Hesperus. The girls are duly betrothed to the appropriate partners, before Buonafede realizes he has been duped.