<p>表现优异却情感淡漠的调查员周书恒（张奕恺饰）调任CID重案组，第一天报到便接手一宗震惊全城的凶杀案，赵敏怡残忍刺死丈夫霍建宇62刀，却始终拒绝透露犯案动机。这宗扑朔迷离的案件，引起检控官周可盈（洪凌饰）的关注。可盈与书恒虽以姐弟相称，却并无血缘关系；自幼失去母亲的可盈，十岁时被书恒父母收养。 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;　　随着接连发生多宗骇人听闻的案件，包括人气女星Jenna遭肢解、残肢被烹煮于麻辣汤中的离奇命案，书恒与可盈逐步被卷入一张由秘密、背叛与错综复杂关系交织而成的巨大网络。与此同时，知名律师周泓涛（郭亮饰），书恒的父亲，也因多名关键嫌犯而卷入案件之中，隐藏多年的家族秘密逐渐浮出水面。 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;　　此时，法医精神科专家Dr Susan Su（林湘萍饰）加入调查团队。她的出现不仅协助警方分析嫌犯心理状态，更揭开了可盈尘封多年的身世谜团。Susan掌握着与可盈失踪生母有关的重要线索，而这段困扰可盈多年的往事，也随着调查逐步展开。案件更从新加坡延伸至西雅图，一宗横跨数十年的悬案重见天日，可盈母亲的遗骸终于被发现。 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;　　另一方面，书恒被诊断患有“述情障碍”（Alexithymia），长期无法理解或表达自己的情感。在Susan的引导下，他开始正视童年创伤，踏上自我探索之路。随着内心逐渐被打开，书恒终于意识到，自己真正深爱的人，并非正在交往的对象，而是可盈。 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;　　然而，就在两人终于看清彼此感情之际，一宗新的命案出现，其作案手法竟与可盈母亲当年的死亡案件如出一辙。面对凶手可能一直潜伏在身边的可怕真相，书恒与可盈必须在悲剧重演前揭开谜团。 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;　　他们能否找出隐藏在阴影中的真凶？又是否有勇气跨越伤痛与心结，选择彼此？</p>