Senji secretly makes a map as she takes various jobs around the school. Distrustful of her, Hao accuses her of hiding his weapon when she cleans his bedroom and demands to taste-test the soup that she has poisoned before letting her serve it to Zeng; to maintain her cover, she intentionally drops it. Once Senji completes her map, she smuggles it to Mudou. That night, Senji offers herself to Sheng, who refuses to take advantage of her, though he agrees that she may play a song for him on her flute. Under the cover of her flute-playing, Mudou's ninja attack the camp, killing many of the students before they are aware of the assault. Senji reveals herself as a spy and mortally wounds Sheng before he can rush to Hao's aid. Mudou kills Sheng and Zeng; Hao, who Senji requests they take prisoner, is the only survivor.