Serial murders, vigilante justice, pre-announced killings, fighting violence with violence... A group of so-called "super detectives" set off the most evil crime in Hong Kong's history! The "crazy detective" Li Jun (played by Andy Lau) who suffers from mental illness breaks into the crime scene alone to find the real murderer! The serious crime team headed by the "super detective couple" Chen Yi (played by Charlene Choi) and Fang Lixin (played by Raymond Lam) also started the road of hunting down the murderer in a race against killing! Between friends and enemies, on the edge of good and evil, what is the truth of the death trial? Who is the real "super detective"?