Cautionary tale features a fictionalized and highly exaggerated take on the use of marijuana. A trio of drug dealers lead innocent teenagers to become addicted to "reefer" cigarettes by holding wild parties with jazz music.
Young Jimmy accepts a ride home from a friendly stranger, Ralph. Jimmy likes Ralph. Ralph likes Jimmy. Ralph REALLY likes Jimmy. Ralph likes Jimmy so much he persuades Jimmy to go to a motel with him. In the motel room, Jimmy decides he doesn't like Ralph THAT much. Ralph has other ideas.