 One of Odilon s friendliest prisoners, master burglar Celle [short for Marcel in Dutch], is being released after ten years. Princess of naiveté Sam gets Jeanne to offer him temporary lodging in her room, yet everybody freakishly hides and locks everything of value away, even though Jef correctly points out a professional finds and cracks everything anyway. Jeanne has a small fortune in cash from the shop in a small metal box. Charles-Victor, who is most suspicious of all, barricades his room with triple padlocks, but ends up locking himself out just when he s in a big hurry to get to class to present his economics dissertation, which is thus about to become part of the course.