On a rainy night, forensic doctor Lin Zhixia was saddened to hear that her sister Lin Zhiyu fell to her death after falling from a building. The police concluded the case as "emotionally out of control", but she firmly believed that her sister, who was looking forward to the future, would not commit suicide.
When packing up the belongings, an old silver mobile phone revealed the mystery: an hour before my sister fell, the same unknown number missed 7 times in a row; in the memo, my sister left the last words of fear: "He is here, don't look for him..."
The police later decrypted the sister's computer and discovered forged contracts, leaked records, and threats from an anonymous "boss": "If you dare to betray, even your sister will not be able to survive."
During the standoff, the old mobile phone suddenly received a text message: "Want to know the truth? See you at the old place tomorrow night - don't tell the police." Do "old places" such as Nanhu willow trees and abandoned factories hide secrets? Is the caller who received 7 missed calls a friend or foe?
With a police ambush on one side and a deadly trap on the other, Lin Zhixia clutched her cell phone and stepped into the fog. In order to restore her sister's innocence, she can only explore the truth in danger.
