Cassius plants the seeds of doubt and suspicion in Brutus's mind by presenting him with forged letters that seem to show the Roman people's desire for him to be their leader. Brutus is conflicted and torn between his love for Caesar as his friend and his concern for the welfare of Rome.
The scene concludes with Cassius expressing confidence that he has won Brutus over to their cause and that the conspiracy is now fully in motion. The final lines of the scene, spoken by Cassius, hint at the tragic events that will unfold: "I see my way clear now, and I shall go / And cast the brand of discord in Antonius's way." This foreshadows the further development of the conspiracy and the impending conflict that will arise as the plot progresses.