Cherry, an eight-year-old girl, witnessed her mother's death. Helpless, she met him at this moment - the serial murderer "Alien Killer" with 20 lives in his hands. The alien killer taught the little girl how to hate the world with cold-blooded methods - "Kill them... The strong is supreme!" Cherry, who was only eight years old, was induced by the alien killer to kill her father with a chain. From then on, she was severely psychologically distorted and began her absurd and bloody life.
Ten years later, when the alien killer committed his "last crime", he was seen through and killed by a female detective named Yun Ling. The true face of the alien killer who is good at disguising himself is enough to become an indelible nightmare in everyone's mind. Under his mask, there is a shocking secret hidden...
Cherry took action and became the most terrifying murderer after the alien killer. "Bloody Cherry" is her code name. At the wedding ceremony of Yunling's younger brother Yunxiao, Cherry successfully killed Yunxiao's fiancée. But this time, she couldn't escape. Her disguise was seen through by Yun Xiao. However, unexpectedly, Yun Xiao did not choose to expose her; and she, Cherry, did not choose to kill Yun Xiao. A strange bond was quietly born between the two.
Little does Cherry know that the shocking secret behind the alien killer mask will eventually be revealed to the public; and even more terrifying, a sinister and cruel conspiracy is subtly devouring Cherry's soul...