While Terzani, Rex and Monterosso are enjoying themselves at the 'Magicland' amusement park, a dancer named Marie who performs in one of the shows is found murdered. The investigations focus on the professional rivalries and jealousies between assorted dancers and stunt men, and then on Massimo Forghieri, the park's director, whom Terzani and Rex discover runs a thriving illegal amphetamine trade among his employees. But the solution to the murder case is far more complex and contorted, and has its roots in a series of tragic events in the past which continue to cause bloodshed in the present.