The missing witnesses resurface while Didier wonders about this unknown phenomenon which generates electromagnetic disturbances and influences the course of time. Véra and Rémy try to unravel the mystery of the shoe pond. The noose is tightening around Didier: if he wants to join Elise and work on the ARIANE aerospace project, he has one month to close GEPAN.

Following the crash of a satellite that everyone takes for the explosion of a flying saucer, Didier is the guest of the 8 P.M. newspaper. Rémy is afraid of being accused of the destruction of the satellite and of losing his position at GEPAN. Vera thinks the key to the mysterious phenomenon lies in the memories of the four witnesses. She helps them remember when they were in contact with the phenomenon.