The world of technical detective Chen Mo completely collapsed after his girlfriend Lin Wei mysteriously disappeared under surveillance at a subway station. Officials determined that she left home on her own initiative, but Chen Mo's sharp eyes discovered the only flaw in the perfect video - the unexplained 13th second blank. He resolutely violated the rules and pursued the investigation alone, and the clues pointed to a technology giant undertaking a subway project and its strange "redundant" probe. However, as he gets closer to the truth, the warning from the dark becomes more deadly: an anonymous text message sent directly to his mobile phone - "Stop looking at things you shouldn't look at." When the enemy's eyes may be hidden in every corner of the city, Chen Mo must race against an invisible and terrifying opponent in the "blind spot" under all-round surveillance to uncover a kidnapping conspiracy woven with perfect technology.
