As Ling sifts through the clues, he finds that all the evidence is pointing toward himself as the murderer. However, Ling';;s belief and unwavering sense of innocence fuels him to maintain his suspicion and keeps digging. Slowly, together with memory re-collection Ling takes temporary leave of absence and enforces a lockdown mode to safeguard his family. It was during the lockdown that his adopted son confesses to Ling his real identity. He is, in fact, the child together with his mother that was abandoned by Ling';;s father many years ago. Driven by an early life of pain, humiliation and suffering faced by his mother he vowed revenge and painstaking made his way back into Ling';;s life as his adopted son. He was able to accomplish this due to a medical condition where his physical stature remains that of a 5 year old. Having shared a bed with Ling';;s wife, played close attention to Ling';;s friends he was able to slowly fulfill his revenge and give out orders for the murders which was carried out by an acquaintance that he had met many years ago at a disability center. Ling';;s wife was murdered by the acquaintance on the site of their premises to which Ling broke down upon discovery. Ling was able to gather himself to dispose of the murderer and was moments away from carrying out justice on his adopted son until the police arrived and shot him. The end of the movie shows Ling';;s boss discovering that the adopted son is in the picture containing Ling';;s childhood friends whilst Ling is in a mental hospital engraving the words "Revenge upon release" on this left arm. Meanwhile his adopted son is depicted on the beach as a maturely dressed child contemplating the future.