The "Ring of Gyges" is a story from Plato's work, "The Republic." It tells of a shepherd named Gyges who discovers a ring that grants him the power of invisibility. With this newfound ability, Gyges is able to act without fear of being caught, leading him to commit acts of theft and even murder. The tale raises questions about morality and justice. It suggests that if people could act without consequences, they might abandon ethical behavior. This story serves as a philosophical exploration of human nature and the impact of power on morality, prompting discussions about the nature of justice and virtue.