"Runaround Sue" by John Cafferty & The Beaver Brown Band is a cautionary tale about a girl named Sue, who is known for being a player and leaving men with broken hearts. The narrator warns listeners to stay away from her, as she has a love that will bring you down and goes out with other guys. The song reflects on the pain of falling for Sue and urges others to learn from his mistake. With its infectious chorus and catchy melody, "Runaround Sue" is a classic rock and roll anthem that has stood the test of time.