In the interactive portion of the module the student must solve a murder mystery, with the aid of Sir Nigel Ambercrombie, an English investigator.  It seems that overnight there was a slight irregularity in conversion for the CSTR at the Nutmega Spice Company: 

It is feared that one of the employees may have been murdered by a fellow employee, and the dead body left within the reactor.  By analyzing the conversion data, gathering information about the plant's personnel, and using their knowledge of CSTR design, students must determine the identity of both the murderer and the victim.  Help may be obtained by questioning the suspects: