The wrongful arson case at Apartment 407, buried for three years, flares back to life when a broken button hidden in a crevice provides a fresh lead. Detective Lu Chen insists on investigating the gaps in the case files, only to stumble into a labyrinth of deadly traps and uncover the deliberate murder behind what seemed to be an accidental fire. The four people involved each played their part, working together to cover up the evidence. Backed by power and connections, they spun a web of corruption and evaded justice for three years. But their alliance, held together by self-interest, was already riddled with cracks. The mastermind lay low, biding his time before turning on the others; former master and student became enemies, and trusted allies drew their blades against each other. Lu Chen and his partner, Shen Que, are dragged into a brutal struggle between multiple factions, reduced to pawns in the battle between good and evil. Refusing to believe that power can shield anyone from justice or accept a foregone conclusion, Lu Chen relies on scattered pieces of evidence and razor-sharp logic to rip through the layers of deception within the system and unravel a conspiracy years in the making. As the countdown to life and death ticks away, he searches for the fourth piece of irrefutable evidence and exposes the shocking truth buried for three years.
