Doctor Faustus, a well-respected German scholar, grows dissatisfied with the limits of traditional forms of knowledge-logic, medicine, law, and religion-and decides that he wants to learn to practice magic. His friends Valdes and Cornelius instruct him in the black arts, and he begins his new career as a magician by summoning up Mephastophilis, a devil. Despite Mephastophilis's warnings about the horrors of hell, Faustus tells the devil to return to his master, Lucifer, with an offer of Faustus's soul in exchange for twenty-four years of service from Mephastophilis. Meanwhile, Wagner, Faustus's servant, has picked up some magical ability and uses it to press a clown named Robin into his service.
Mephastophilis returns to Faustus with word that Lucifer has accepted Faustus's offer. Faustus experiences some misgivings and wonders if he should repent and save his soul; in the end, though, he agrees to the deal, signing it with his blood. As soon as he does so, the words "Homo fuge," Latin for "O man, fly," appear branded on his arm. Faustus again has second thoughts, but Mephastophilis bestows rich gifts on him and gives him a book of spells to learn. Later, Mephastophilis answers all of his questions about the nature of the world, refusing to answer only when Faustus asks him who made the universe. This refusal prompts yet another bout of misgivings in Faustus, but Mephastophilis and Lucifer bring in personifications of the Seven Deadly Sins to prance about in front of Faustus, and he is impressed enough to quiet his doubts.Armed with his new powers and attended by Mephastophilis, Faustus begins to travel. He goes to the pope's court in Rome, makes himself invisible, and plays a series of tricks. He disables the pope's banquet by stealing food and boxing the pope's ears. Following this incident, he travels through the courts of Europe, with his fame spreading as he goes. Occasionally, he is invited to the court of the German emperor, Charles V (the enemy of the pope), who asks Faustus to allow him to see Alexander the Great, the famed fourth-century B. C. Macedonian king and conqueror. Faustus conjures up an image of Alexander, and Charles is suitably impressed. A knight scoffs at Faustus's powers, and Faustus chastises him by making antlers sprout from his head. Furious, the knight vows revenge.
Meanwhile, Robin, Wagner's clown, has picked up some magic on his own, and with his fellow stablehand, Rafe, he undergoes a number of comic misadventures. At one point, he manages to summon Mephastophilis, who threatens to turn Robin and Rafe into animals (or perhaps even does transform them; the text is not clear) to punish them for their foolishness.
Faustus then goes on with his travels, playing a trick on a horse-courser along the way. Faustus sells him a horse that turns into a heap of straw when ridden into a river. Occasionally, Faustus is invited to the court of the Duke of Vanholt, where he performs various feats. The horse-courser shows up there, along with Robin, a man named Dick (Rafe in the A text), and various others who have fallen victim to Faustus's trickery. But Faustus casts spells on them and sends them on their way, to the amusement of the duke and duchess.
