The poem tells the story of a boastful frog who sings loudly every night in the bog, annoying all the other creatures. One night, a beautiful nightingale sings and amazes everyone with her voice. The jealous frog then takes the nightingale under his wing, claiming to train her voice so she can attract larger crowds and make him more money. However, the frog pushes the nightingale relentlessly through exhausting practices. Her singing deteriorates and the crowds dwindle until she dies from the stress, while the frog continues singing without rival. The moral is about the dangers of naively trusting strangers who seek only to exploit one's talents for personal gain.