Final answer:
Cassius' plan at the end of Scene 2 of Julius Caesar is to assassinate Julius Caesar.
Step-by-step explanation:
In Julius Caesar, at the end of the Scene 2 (lines 411-416), Cassius devises a plan to mainly assassinate Julius Caesar. Cassius and his co-conspirators believe that Caesar's accumulation of power and his appointment as dictator for life pose a threat to the Roman Republic, so they decide to take action and eliminate him.
This plan is a significant turning point in the play and sets the stage for the events that follow.