The Thirteenth Unsent Letter

"The Thirteenth Unsent Letter" tells the story of a search for the truth that spans twelve years. Su Wan's sister Su Wei died in a car accident on a rainy night, and the perpetrator escaped. Twelve years later, Su Wan, who had become a project manager, fought against the developer to protect Wutong Street, which carries memories, but unexpectedly discovered that the car accident that year was related to the developer's senior management. With the help of Lin Shen, the owner of "Time Slow Delivery", she found the letters and diaries left by her sister and uncovered a buried family secret. As the investigation deepened, a conspiracy involving chemical weapons during the Japanese occupation and spanning three generations came to light. In the process of pursuing justice, Su Wan and Lin Shen supported each other, and finally not only brought the real murderer to justice, but also healed their inner wounds, learned to reconcile with the past, and rebuild life and hope on the ruins. The story explores memory, justice and forgiveness, and tells the tenacity of individuals to protect love and dignity in the tide of the times.