Gu Shun: One of the senior FBI agents who has been lurking in the U. S. Headquarters of the black organization for five years. During this period, he secretly provided organizational intelligence to the FBI.
Ou Xiaojian: Fatherless and motherless, he lives with his grandmother. He is one of the many killers trained by the black organization since he was a child. He has killed countless people. After learning that his parents were murdered by the organization, he turned to the dark side and turned to the dark side.
Purpose: Healing and saving each other