In the City of the Ghosts (Where is the Mediator ?)

There was a need for a Mediator, it realized Detective Man that there is not other way to resolve an sprang "issue". Several "subjects" could respond to a serie of orders, and to achive coordination of so disparate names leads to a Mediator.
When decided to set it, some systems decided to stop working, and the need of a Mediator made itself mandatory. What Man could not execute, was an order that made those systems work as expected. Then, study how Mediator works, and there, in the table of study, found out the exact blueprint they take to do the job...