The play centres on Chremylus, an exasperated Athenian who asks the Delphic oracle if he should bring his son up to be good or bad in order to prosper in life. The oracle leads him to a blind man who turns out to be the god of wealth, Plutus. Chremylus arranges for his sight to be restored at the temple of Asclepius. As a result, Plutus is able to reward the good and impoverish the bad. The newly wealthy Chremylus then receives a stream of visitors to his home, whose various situations illustrate the way Athenian society has been turned up side down as a result.
Free online texts
Gutenberg: The Eleven Comedies, Volume 2 - The Wasps - The Birds - The Frogs - The Thesmophoriazusae - The Ecclesiazusae -- Plutus. English translation, multiple formats.
Internet Archive: L 179 - Aristophanes III - Lysistrata, Thesmophoriazusae, Ecclesiazusae, Plutus. Bilingual Greek-English Loeb edition.
Poetry in Translation: Wealth, translated by George Theodoridis. Multiple formats.
University of Adelaide (Internet Archive): Plutus. English translation, multiple formats.
History of Ancient Greece: o54- Old Comedy and Aristophanes. Podcast by Ryan Stitt.
Wikipedia: Plutus (play).
The Great Conversation: Further reading at Tom's Learning Notes
Ancient Greek resources: Learn to read Greek classics in the original.