失去至亲的谢岚山（彭冠英 饰）和沈流飞（张雨剑 饰）在警察学院期间建立了浓厚的情感，两人誓言要成为优秀的禁毒警察。然而，一起贩毒案件将两人意外的卷入其中，谢岚山也正式以卧底身份加入“逆光行动”之中，并通过自己的能力一步步成为大毒枭穆昆的左臂右膀。沈流飞则凭借自己的努力顺利毕业进入瑞沧市禁毒大队，如愿成为一名禁毒警。若干年后，两人再度重逢，沈流飞却震惊的发现谢岚山不仅完全失去了记忆，并且接受过心脏移植手术……

Lulu, an excellent staff at a devil’s factory, collects human souls to make “candy.” His flawless work record is disrupted by the kindness of a little girl and her father, a candy designer, prompting him to visit their human candy shop. The little demon, who subtly reveals himself when he consumes candy, experiences the pure magic of sweetness for the first time. However, his duty to hunt souls forces him to confront the tragic shattering of beauty.

聚焦未成年人司法保护，讲述了未成年人检察小组初创，检察官林之桃与助理检察员白恩宇，为了孩子们，携手对抗人性之恶的故事。 始于悬念，终于救赎；拨开迷惘，山止川行。