Julius Caesar- Defeated Pompey, and is ow the ruler of Rome. Cassius- Jealous of Caesar, forms a rebellion against Caesar and conspires to kill Caesarr. 
"....Noble Brutus..." 
*GASP* GET THEM!!!lllllllllll
Brutus receives a letter to join the Conspirators, and he accepts the invitation. 
The group of conspirators kills Caesar, and Brutus is the last to do so. 
"This was the noblest Roman of them all." 
Antony and Brutus give Caesar his funeral speech,  and Antony gets the crowd to turn against the conspirators., and rive them out of Rome. 
Brutus and Cassius are forming a team and preparing for battle against Antony and Caesar's son. Octavius and Brutus are angry because Cassius is taking bribes and is corrupt while Brutus argues with Cassius about going to Philippi to battle in the war.
Brutus, Cassius, Antony, and Octavius go out to war. Cassius judges the war wrong, thinking they are losing so he kills himself. Brutus is afraid of being captured by Antony and is being humiliated in all of Rome, so he too commits suicide.  Antony gives Brutus an honorable and memorable burial.