During the first readings of the one- and two-voice Lessons of Darkness for Holy Wednesday, the idea of ​​accompanying them with mysterious resonances emerges. To appeal to the composer Gérard Pesson then becomes obvious, in order to insert between each of them two contemporary antiphons for voices and instruments, such as brief breathing, alive.

The Shadows agrees the sweet voices of French soprano Chantal Santon Jeffery and Anne Magouët, always accomplices, to give a new meaning to the air melism of Couperin and Pesson, from yesterday to today.