What is the theme of four ‘0 clock by price day

Oliver Crangle, a dealer in petulance and poison. He's rather arbitrarily chosen four o'clock as his personal Götterdämmerung, and we are about to watch the metamorphosis of a twisted fanatic, poisoned by the gangrene of prejudice, to the status of an avenging angel, upright and omniscient, dedicated and fearsome. Whatever your clocks say, it's four o'clock, and wherever you are it happens to be the Twilight Zone.

Explanation:

i cant see the passage although i do know hyperbole means overly exaggerated such as "i can eat an enter horse"! i hope this you!