Auzou Book for walter theater investigation

Archibald, the director of the theatre le Rat conteur, goes to see Walter about a matter of utmost importance: he has received a letter that threatens to sabotage tonight’s performance… Walter won’t let this slide and rushes to the theatre to question the actor, prop master, lighting technician, and costume designer. Who would have a reason to cancel the show? This is what Walter is going to try to find out.