A series of disappearances occurred in Binhai City. The only thing they had in common was that the missing persons had strange marks on their left hands. Lin Mo is entrusted by a desperate mother to find her missing son. During the investigation, Lin Mo was near death accidentally and found that he could see the "death countdown" (a number invisible to ordinary people) above other people's heads. He saw with his own eyes that a passerby's countdown instantly reached zero, and that person died immediately in a seemingly accidental accident. Lin Mo used his new abilities to help Lu Chenfeng solve the case, which attracted Su Mian's attention. She found that Lin Mo's ability was highly consistent with the "person who could see time" described by her brother before his disappearance. Lin Mo discovered that all the missing people were related to a mysterious online forum called "Time Series". As he got deeper into the forum, he found that the marks on his wrists were starting to get hot. A hooded figure appeared behind him and whispered: "You're awake too, Observer."
