A dead body， with its throat slit open， is found in a theater. Though the stern detective Chen Weikun （Nie Yuan） suspects the victims stepson XuFeng （XinPeng）， he cannot make an arrest without evidence， and is forced to watch Xu leave town. A decade later， a mysterious Dr. Wang Dong （Luo Jin）， who startlingly resembles a bystander at the crime scene， appears on Chens radar， as does a dissolute Xu. With sumptuous visuals and sound effects， Ash was tailor-made for the big screen， but had to premiere on Youku.com in late June due to cinema closures during the Covid-19 pandemic.?