There is a parade celebration for Caesar. Caesar is walking with Marc Antony and Calpurnia. A soothsayer approaches Caesar and warns him, "Beware the Ides of March!". Caesar blows him off without taking his warning.
Act IV: Scene III
Brutus is at home when his servants gives him a letter and says he sees the conspirators. Brutus tells him to let them in. They tell Brutus their plans and Brutus agrees to join. Brutus instantly becomes the leader. "Our Course will seem too bloody, Caius Cassius."..."Lets be sacrificers but not butchers, Caius."
Act V: Scene III
The conspirators are by Marc Antony and Caesar in the streets of Rome, they plan to kill Caesar. Trebonius draws away Antony. Casca gives the sign "Speak hands for me!" and they stab Caesar. Caesar sees that Brutus has betrayed him, " Et tu Brute? Then fall, Caesar.". Caesar is hurt by this betrayal.
Brutus and Cassius are arguing in Brutus' tent. They eventually resole their argument and decide to go to bed. They order a few people to sleep in the tent with them. Caesars ghost visits Brutus and warns him, "To tell thee thou shalt see me at Phillipi.". Brutus wakes up everyone and decides to march straight to Phillipi.
The battle starts. Brutus has the upper hand but Cassius does not. He sends Titinius to check on Brutus and his troops and Pindaurus to watch Titinius. Pindaurus thinks Titinius is killed so, Cassius commits suicide and Pindaurus assists him.
Brutus and Cassius kill and betray their friend Caesar. Brutus and Cassius go to war. Many things go wrong. Cassius and Titinius both die due to misunderstandings. When Brutus sees this he blames Caesar, later Brutus dies and says,"...Caesar, now be still; I killed not thee with half so good a will.".