The novel tells the story of a princess who begs a frog to recover the precious golden ball that drifted into murky waters of a pond. In return, she promises her friendship to the amphibian. However, after fulfilling her plea, the girl denies her commitment. But her father, the king, is anhonorable man and when he learns of the pact between his noble daughter and the inhabitant of the slimy pond, requires his young dughter to accept his friendship ...