Caesar returns from battle and Flavius and Murellus take down all of the decorations for him because they don't support him. A soothsayer tells Caesar to beware the ides of march but he ignores him. Cassius talks to Brutus about him becoming leader instead of Caesar and plans to throw letters with compliments in his window to make it seem like it came from the people of Rome. Also, Caesar refused the crown and had a seizure in front of everyone.
Thou shalt see me at Phillipi
Brutus is in his garden and Lucius, his servant, brings him the letter Cassius threw in his window. He comes to the conclusion that Caesar must die. He thinks that Caesar is abusing his power and determines that Antony should not be killed but Cassius thinks that he should be. Calpurnia has a dream that Caesar has been killed and asks him to stay home. And Portia figures out what Brutus is planning to do and is trying to stop it.
He was the noblest Roman of all!
They successfully carry out their plan of killing Caesar and Casca stabs him first. Antony is sad about this because he was friends with Caesar. Brutus and Antony give a speech at Caesar's funeral and Antony makes the people go against Brutus and the conspirators. At the end they kill Cinna because they think he's a conspirator.
A couple of months pass and there is a chaotic war going on. Brutus and Cassius have gone to Sardis and Antony, Octavius, and Lepidus are now leading Rome. They plan to change Caesar's will to get money for themselves. Cassius is upset with Brutus because he called him out on taking bribes and Portia commits suicide by swallowing hot coals. Brutus wants to march to Phillipi to meet up with Antony's army. And at the end Caesar's ghost visits Brutus.
Antony thinks that Brutus and Cassius have brought their army to Phillipi because they're trying to act tough when their really not. Cassius kills some of his own men because they were being cowards and running away from the battle. Cassius realizes that they lost and asks Pindarus to stab him and he dies. Next, Titinius kills himself and Brutus' army loses. Brutus asks Strato to kill him and Antony praises Brutus in the end because he killed Caesar to better Rome.