Spider in the Moon/Black Butler Alois Story

Alois Trancy was sitting down in his office like he did every day. It was late at night that he had asked Claude for some Tea. He later looked at the moon as he waited for his tea. Once Claude delivered the tea and left suddenly there was a Shadow of a Spider on the moon. A day later there was a report of a Murder. This kept happening every week until he gets a mission from the Queen to solve the case. What could be going on? Will Alois be able to find the cause of this? What will be his final reaction when he does?