Di Wuyan, an archivist at the Tingen Municipal Police Department, discovered a series of bizarre death cases that had been deliberately covered up among the dusty old papers. His search for the "sealed" file led him to a strange brass whistle. As he sinks deeper and deeper, the boundaries between reality and the extraordinary gradually blur. A world of extraordinary people, secret organizations and terrifying truths that he should not have known is slowly opening to him.
