Jiang Mumu, who was ostracized by his classmates, fell to his death. His best friend Wu Sihan hoped to avenge him. Red criminal master Qi Mu pretends to help and makes a perfect revenge plan - all classmates will receive devil buttons, and those who do not repent or press the button will die. In fact, it was to release the murderous intention in Wu Sihe's heart. However, at this moment, Qi Mu's "Murder Note" was stolen, and people really died one after another in a planned way! Is there really a button demon? Qi Mu felt that a more powerful killer had appeared! The criminal master showdown begins now! The story of reasoning notes continues here.
