Rome, 44 BC. After defeating Pompey in civil war, Julius Caesar has returned to Rome as its sole ruler, though not all Romans welcome his return. Two tribunes, Flavius and Marullus, who are responsible for peace in Rome, chastise citizens celebrating Caesar's victory. They remove decorations from statues and warn the consequences of Caesar becoming too powerful. Meanwhile, Caesar watches his wife Calpurnia being blessed by Mark Antony during a festival race, as conspiracies against Caesar's rule begin to take shape among some discontent Romans.