Out of sight, a factory produces a chromic-sulfuric mix which is used in the industry to dissolve organic matter. Zaïna and her apprentice Romuald keep a watchful eye on the aera.
| Actor | Role |
|---|---|
 Édouard SulpiceRomuald | Romuald |
| VValérie VogtZaina | Zaina |
 Sebastien BihiRichard | Richard |