C204 Poisoning(part Ii)

"Shh …" After the maid arrived outside of the room, she inserted a small bamboo tube into the window and blew on the end of the small bamboo tube. Instantly, a white smoke filled the room.

"Creak …" After the maid calculated the time outside the door, she took out a silk handkerchief and tied it around her face to cover her nose and mouth. After she finished preparing everything