On that bloody night twenty years ago, Gao Yan held a black umbrella and retrieved the dying girl from the pile of dead people. He named her "A Jing" and marked her for life. He is the master of the underground trade in Southeast Asia, cold-blooded, pathological, and extremely controlling; she is his sharpest knife, blocking bullets for him, cleaning up the door, managing the bloody business, and is even ready to sacrifice her heart at any time - the organ that perfectly matches him and beats for him.
This is a dark fable about domestication and obedience: he taught her to hold a knife, shoot a gun, take human life, and also taught her the boundaries between pain and loyalty; she was his most perfect work and his most expensive spare heart. When violence, power and twisted possession are intertwined, when "no death" becomes the cruelest love word, this bond that began on a rainy night will eventually come to an end in ashes and heartbeats.