On a Leap Day four years ago, Sculptor Shaw Ruo-Yun's daughter, Sera Sun, was killed and mutilated. Her dismembered limbs were found to be clad in stockings. The police, despite constant pressure from Ruo-Yun, were unable to find the culprit. Ruo-Yun took matters into her own hands and created an exhibition as a memento to her late forgotten daughter, as a way to call out the murderer. A few days later, a young female corpse was found with her limbs intact, but similarly to Sera's death, her legs were clad in stockings.

Allan learnt that his wife had sold herself in exchange for her exhibition. He lashed out on Ruo-Yun who then tried to report Allan for domestic abuse. She met Ya-Ge outside the police station. His words convinced Ruo-Yun and she decided to not report Allan. Guo-Guang discovered Sera's account under the name of "Freedom" on the porn site that Cindy was active on. Turns out, Guo-Guang knew Sera all along!