裴溯又做了一个梦,和上次一样,他梦见到了小时候的自己,还有正在燃烧的纸片,唯一不同的是,他又看到了母亲的尸体,看到了小时候的自己,呆立在母亲的尸体旁,两行泪水顺着他的脸庞留下,一双大手捂住了他的眼睛,那双大手就是骆队的。在梦中惊醒以后,裴溯又听到清理者的声音,原来他是听着录音睡着的。此时骆队也在听着这个录音,他正品味着清理者所说的话,陶泽突然给他打来电话,在北州的盘龙山上,平韶中学组织学生旅游,结果发生了抢劫案,劫匪离开以后,一个叫曲潼的女学生却失踪了,挂断电话以后,骆队立刻赶往出事的地方,到了那里以后,他看到裴溯和周洪川也在那里,便感觉有些奇怪,经过询问才知道,周洪川组织了一个赛车俱乐部,他们的俱乐部,今天恰好在盘龙山组织活动,得知有人失踪了,周洪川便号召大家一起寻找。很快有人发现了曲潼的行踪,在盘龙山的一条小道上,他们发现了曲潼的脚印,但那里只能作为案发现场,因为在曲潼失踪的时候,天上正下着小雨,所以那些脚印特别清晰,骆队看着那些脚印,脑子里立刻出现了一个画面,有人在追踪曲潼,曲潼在逃跑的过程中突然摔倒,有一个男人走过来,将她从地上拉起来。曲潼的父亲老曲,给警方送来了一段录音,有人将那段录音,放到了他家的奶箱里,并敲响了他的门。骆队仔细听了那个录音,在里面听到了铃铛的响声,这让他禁不住想起,16年前莲花山旧案,第6个受害者的父亲老郭,当年曾向警方提供一个消息,在女儿失踪以后,有人给他打了一个电话,对方并没有说话,但他听到了电话那头传来的铃铛声,因为曲潼失踪的时候,也是穿着碎花裙子,骆队感觉这起失踪,与当年的失踪案非常相似,便向杜组长请示,将两起案子并案调查。当年那起失踪案,凶手后来抓到了,凶手名叫吴广昌,虽然当时吴广昌不承认,但因为在他家里,发现了几套带血的衣服,加上第7个受害女孩苏灵奈的指认,最终证据确凿,便给他定了罪,骆队怀疑,凶手很有可能不是吴广昌,而是当年没有抓住的零度共情者,听了骆队的分析,杜组长同意了他的请求。晨晨穿着碎花裙子,正坐在路边等公交,有一个拄着拐棍,戴着墨镜的老人,突然走到她的身边,看到那个人走向自己,吓得她大叫一声,赶快逃跑,在逃跑的时候,她撞到一个漂亮姐姐身上,当漂亮姐姐问她为什么这样惊慌时,她回头再看那个奇怪男人,却发现对方已经消失了。骆队再次找到郭菲玲的父亲老郭,并把最近的失踪案对他说了,并把在那段录音里听到了铃铛声,也告诉了他,
A girl goes missing in Xiling District. When Luo Wei Zhao and the Special Investigation Department rush to the scene, they find Pei Su and his team there by chance, who happened to be at the race track. As the investigation progresses, Luo Wei Zhao finds a common thread with a series of girl disappearances that occurred 16 years ago, but the father of the missing girl stabbed the suspect to death at the time, and the investigation ended with the suspect dead. Luo Wei Zhao visits Guo Shi Nan, the victim's father, who has been released after serving his sentence. As he asks Guo Shi Nan to recall his memories from that time, the existence of a certain man emerges.
Uma garota desaparece no distrito de Xiling. Quando Luo Wei Zhao e o Departamento de Investigação Especial correm para o local, eles encontram Pei Su e sua equipe por acaso, que estavam na pista de corrida. À medida que a investigação avança, Luo Wei Zhao encontra um ponto em comum com uma série de desaparecimentos de meninas ocorridos há 16 anos, mas o pai da menina desaparecida esfaqueou o suspeito até a morte na época e a investigação terminou com a morte do suspeito. Luo Wei Zhao visita Guo Shi Nan, o pai da vítima, que foi liberado após cumprir sua sentença. Quando ele pede a Guo Shi Nan que relembre suas memórias daquela época, surge a existência de um certo homem.
