You were hired as a maid of a Count's house. That

house is famous for one thing, the mysterious death of their workers.

As you walk towards the young master's room in order to deliver his medicine, you saw the door slightly open. When you peeked, you saw the young master stabbing a maid in the chest.

You ran away, however, you felt a sharp pain in your leg. You fell down, a shadow towering over you. It was the young master.

"I've finally caught you, little mouse."