Thomas lives in a military base on colony of Madagascar, with his parents and friends. He gradually becomes aware of territorial and sexual politics while finding an outlet for his imagination in the exploits of crime-buster Fantômette.
It is party day at Marguerite Dumont's castle. She sings wholeheartedly, but terribly out of tune. Marguerite has been living her passion in her own bubble, and the hypocrite audience acts as if she was the diva she believes she is.