This tells the story about a policewoman, Ran Dongdong, who solves the "Big Trap Case" and raises reflections and questions about marriage and love in the process of doing
After talking to Bu Zhilan, Liu Qing came to see Ran Dongdong, saying that he had not killed anyone and began to confess the truth. A year ago, Liu Qing was applying for an immigration to Xia Bingqing, and met a decoration worker named Yi Chunyang. They worked near Liu Qing's company and became familiar with each other. Yi Chunyang also showed Liu Qing's poems he wrote. Because he could not complete the plan to immigrate Xia Bingqing, Liu Qing was about to escape. On the day he returned to the company to pick up things, he met Yi Chunyang again.