Marcellus and Flavius criticize the commoners for celebrating Caesar's recent military defeat of Pompey since they feel it's actually a sad day. During a victory march, a soothsayer warns Caesar to "Beware the Ides of March" (March 15); Caesar ignores him. A race is run, wherein Marc Antony, in the course of competing, touches Caesar's wife Calphurnia in hopes of curing her infertility. During the race, Cassius tries to convince Brutus that Caesar has become too powerful and too popular. Brutus neither agrees nor disagrees. Caesar confers with Antony that he fears Cassius is evil and worth fearing. Casca explains to Brutus and Cassius that shouting they heard was caused by Caesar's thrice refusal of a crown offered to him by Antony (though confusing, the commoners rejoiced that he had refused it for it indicated he is a noble man). At the third offering, Caesar collapsed and foamed at the mouth from epilepsy. Afterward, Caesar exiled/executed Flavius and Marcellus for pulling scarves off of Caesar's images (statues). In a thunderstorm, Casca meets Cicero and tells him of many ominous and fearful sights, mostly of burning images, he has seen. Cassius then meets Cicero and tells him the storm is a good sign of the evil he and his other cohorts plan to do to Caesar. It seems the senators plan to crown Caesar King, but Cassius aims to prevent it, or else commit suicide. Casca agrees to help Cassius. Cinna informs Cassius that Decius Brutus (actually Decimus), Trebonius, and Metallus Cimber will help them to kill Caesar.

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