Wu Shijie, who had a withdrawn personality, left a mysterious phone call to Yin'an and then disappeared.
Yin An originally had no interaction with him, but various clues show that Wu Shijie's disappearance is inseparable from her. Not long after, Yin'an also disappeared.
During the investigation, police officer He Jin accidentally discovered a secret organization hiding in this small town. They have a huge underground network.
Yin'an showed up with a secret, and she decided to join forces with He Jin to find Wu Shijie and obtain evidence of crimes committed by secret organizations.
But they were repeatedly obstructed by Yin'an's parents. Could it be that they also have some connection with the mysterious organization?
Regardless of He Jin's objections, Yin'an resolutely joins the enemy camp as an undercover agent.
Complicated life experience, tragic fate, mysterious whereabouts, hidden secrets... As the investigation deepens, the truth gradually becomes clear. What will be Wu Shijie's final ending?
What is the true face of this mysterious organization?
