No One Gets Left Behind - S1.E20

Realizing that Ka Hei is missing, Nok Hang and Chi Kiu search high and low for her. Ka Hei's mom shows up at the office, and together, the three of them set out to the place where it all began to find Ka Hei. When the police arrive at the scene, the trio once again reveals a shocking truth about the person behind Lam Yuen Yuen's death. After the whole ordeal, one of the guys decides to step out of Ka Hei's life.