Establishments like the Alcazar, the Folies Bergère, the Amphitheatre, proposed performances of dancers who, by means of cables or optical effects, rose a few meters in the air.

The novel was published by Banquises et comètes, and a comic book re-creation, LADY-BIRD, was developed by writers Fabrice Sapolsky and Dawn J. Starr, and the artist Daniele Sapuppo.

In addition, Vega benefits from twelve life tubes: substances manufactured by her friend, Aour-Ruoa, an Egyptian scientist capable of telepathy, which allow her to temporarily increase her senses, her endurance or to reinforce her metabolism.

In this universe, technology is advanced thanks to the work of the brilliant alchemist Fedor Romalewski in his laboratory "The Green Island" and to the revolutionary organization The Companions of the Black Star.

[2] The Companions of the Black Star are in conflict with another secret society, the Friends of Happiness; and if the Oiselle has a deep sense of good and evil, the organization is much more pragmatic and does not hesitate to commit crimes to achieve its ends.