薇坦是一位心理研究的天才新人，凡事喜欢做分析，看上去不太符合她这个年龄的女孩子，有时候甚至像个外星人。但是在工作中，她的脑袋里仿佛有台机器在高速运转，这是蜗牛女孩与生俱来的天赋，工作中判断果断、迅速，分析精准。她的意志力比体能强，所以遇到危险时刻她也不会慌张。
初到警队，在人际交往上很不来事，且不懂如何表达自己感情的她，因为体能不及格面临着被赶出警队的问题。从一个菜鸟实习生正式转成她梦想中的专业警察，唯一一个可以帮助她的是博拉警官，泰国警察界的英雄，于是薇坦想尽办法使出浑身解数请求博拉收她为徒。
而男主博拉是警局特别案件调查组队长，警队首屈一指的神探，因有丰富的办案经验而杰出和英勇，身体素质优秀，身手不凡。
博拉起初对这个弱不禁风的小女孩并无好感，两人在办案理念上也有极大差异，但两人在联手破获了一系列案件后，博拉对这个单纯睿智的爱徒心生爱慕。
但奈何无论他如何明追暗夺，这个如“蜗牛”般迟钝的女孩，就是收不到爱的信号。在二人“谈情说案”之际，沉寂已久的“连环杀手”悚然重现，将他们卷入其中，两个人终于在险象环生的探案过程中确定了对彼此的情谊。
然而此时，萦绕在博拉心头的噜格案也再次被重启，这对恋人将携手共进极致艰险的追凶之旅。
Vita is a rookie genius in psychological research. Her brain works as if there were a rapid generator in it. Upon joining the police force, she is facing the fate of getting removed due to her weak physique. Since Officer Pla is the only one that can help her, Vita tries everything to make Pla take her in as his mentee. As the captain of the Police Investigators Team, Pla is one of a brilliant, experienced, and skilled investigator. At first, Pla doesn't like Vita. Besides, both are not on the same page regarding how to deal with cases. Having joined hands and solved a series of cases, Pla begins to fancy this innocent yet witty mentee of his. Vita, who is as dull as a snail, does not feel Pla's love. When the two of them are talking about love and cases, the spooky serial killer is back. Pla and Vita finally acknowledge their feelings toward one another in the face of danger. The lovers are once again joining hands to embark on an extremely menacing journey of catching the criminal.
