1999 年始的数年内,一向安宁平静的弘州市先后发生多起针对年轻女性的强奸命案,受害者的皮肤均遭凶手割下奇异的血雏菊形状。负责侦破这场惊天连环凶杀案件的重任,则交到了警察刘一波,和搭档何晨的肩上。而这场斗智斗勇的追凶之旅,一追就是十九年……Set in 1999, a lower-tier China city. A series of rape and murder cases take place. Two police detectives start to chase the murderer. The chase lasts for nineteen years.