In the image Justice is deprived of her rightful role by the fool. Late medieval and early modern society was quite litigious and the original woodcut was intended to show the folly of "Quarrelling and going to court' or recklessly taking every dispute before a judge.
Within the moral scheme of the seven virtues justice comes under the heading of Temperance along with humanity, honour and abstinence. As well as restraint Temperance refers to the practice of mindfulness of others, judging among different courses/causes of action and rightful moderation between self-interest versus public interest and the rights and needs of others.
Here's a link to a tarocchi card with the image of justice without blindfold dated 1530-1561.