This book is a story about the buying and selling of second-hand houses. It mainly unfolds the plot through the purchase and sale of a second-hand house between two families, Zhang Damao and Sun Xia. The branch line is a murder case that occurred in the second-hand house. The two clues intersect and influence each other. The ending of the story is unexpected. The lovers finally come together and the case is solved. However, the social reality and the mentality of relevant people reflected in the book are thought-provoking.
