The play 'Julius Caesar' is a history play and tragedy written by William Shakespeare that tells the story of the conspiracy against Julius Caesar and his eventual assassination. The play explores themes of power, loyalty, and betrayal, and features iconic characters such as Brutus and Cassius. The story takes place in ancient Rome and is based on historical events. The play opens with the triumphant return of Julius Caesar from battle, and follows the events that lead to his murder by a group of conspirators, including Brutus and Cassius. The play also explores the aftermath of Caesar's death and the power struggle that ensues. Through the characters of Brutus and Cassius, the play examines the motivations and consequences of political ambition and the nature of loyalty and betrayal.