Dao was life sentenced from the guilty of murder at first degree which changed her world upside down, once young bright graduate with prosperous future with her boyfriend turned to be a convict in Area 8.

Gun Metal Grey is a 2010 Hong Kong police procedural television drama produced by Television Broadcasts Limited. It originally aired on Jade from 1 November to 10 December 2010, consisting of 30 episodes. Gun Metal Grey is a dramatisation and fictional telling of Hong Kong's top ten criminal cases, which tells about the complexities of human nature and the strangeness of truth. Gun Metal Grey is written by Lau Choi-wan and Leung Yan-tung, with Terry Tong serving as the executive producer. The drama is one of two grand TVB productions to celebrate the channel's 43rd anniversary, the other being No Regrets, both were the first to be broadcast live in English subtitles. The Chinese title of Gun Metal Grey literally means "criminal police", which can also be used to a describe a cop who commits a crime. During early promotions for the drama, the year "2010" was attached to the Chinese title to prevent confusion with previous dramas of a similar title. The English title is a wordplay on the colour of guns, a representation of criminal justice, and Felix Wong's character Stone Sir, a cop who finds himself trapped in a grey area of morality.

Roberto, a drummer in a rock band, keeps receiving weird phone calls and being followed by a mysterious man. One night he manages to catch up with his persecutor and tries to get him to talk but in the ensuing struggle he accidentally stabs him. He runs away, but he understands his troubles have just begun when the following day he receives an envelope with photos of him killing the man. Someone is killing all his friends and trying to frame him for the murders.