The protagonist Wu Ying transforms into a "ghost" and uses his identity as a mathematics teacher as a cover to launch activities against 99 cuties. He issued an event notice to the security office in advance, completed the event under strict protection, and used his high IQ to create impeccable and perfect plans. The whole series focuses on hard-core reasoning, peak wits, and no female protagonist. The whole process is logical and brain-burning, staging a thrilling game of good and evil.