The nearby establishment used to have an entertainer named Rick work there. He is a close up magic artist as well as a very talented guitar player who would entertain diners as they ate. He would go table to table performing magic tricks and then would perform on the stage amazing customers again with his music.
This cache brings the magic back to this building. Unfortunately, Rich used his magic dust and caused the cache to disapear before he left. Your job as magic apprentice is to make it reappear, sign the log and then once again make it disappear before leaving. Good Luck.