Chi Zhen (Zhai Tian Lin), a cunning lawyer who operates on both sides of the law, seeks revenge and finds himself imprisoned, which only strengthens his resolve. Meanwhile, Lu Li (Yin Zheng), a top police academy student, quickly rises through the ranks to become a police chief by solving challenging cases. Despite their vastly different backgrounds, fate brings these two unlikely allies together to tackle an extraordinary crime that will test their skills and partnership. "Original Sin" is a suspenseful 2018 crime drama directed by Raymond Yip.