Giselle is arguably the most mystical ballet in the repertoire today. Let’s start with the fact that its libretto is based on a fantastical story about a love that overcomes the barriers between two worlds. It is a story in which the young heroine, dying from a broken heart, mysteriously hears the call of ghosts tempting her to join their round dance, and has become one of them she saves the lover who betrayed her. In the era of romanticism, the apogee of searches in ballet came with Giselle which was created in 1841, and tales of other worlds were well familiar to audiences. Giselle, too, was an ideal embodiment of a romantic dual world where the living energy in scenes from real life in Act I is contrasted with the bewitching incorporeality of the dance of the wills in Act II. It was not without the influence of this popular production that the subsequent ballet repertoire was enriched with different shadows, nymphs and other inhabitants of visions. Besides the plot, the history of the ballet is also full of enigmatic transformations. These transformations may not always be mystical, often they are easily explicable in terms of logic, but they are reminiscent of a detective investigation as an attempt to establish those who created the ballet and their share of the input into creating the masterpiece Giselle, and they have ensured the fame of this incredibly mysterious ballet.