Han Junfeng, codenamed "Shadow Seven", is the most ruthless S-class killer in the organization. After a mission failed, the organization gave him an ultimatum - sneak into the Shen family in Jiangnan, disguised as "Han Jun", an orphan from the side branch, obtain the military talisman of the former dynasty hidden under the ancestral hall, and eradicate Gu Yanzhi, the fiancé of the eldest daughter of the Shen family.
The mission should have been simple. He is very good at pretending to be good, acting miserable, and deceiving sympathy. But he didn't expect that Shen Zhiwei, a pampered young lady, would really love him as a biological brother - making soup for him, taking him to temple fairs, protecting him in front of evil slaves, and even staying up all night when he was "sick".
Han Junfeng had killed many people, but he had never been treated so tenderly. He began to waver, began to hesitate, and began to wonder whether he was acting, or whether he really couldn't bear to leave this sister who called him "Xiao Juan".
Until Gu Yanzhi also began to covet the military talisman, until the organization was watching covetously from outside, until that night, he had to make a choice - whether to continue to be a cold-blooded killer, or to betray the organization and his only rule of survival for the past twenty years for the sake of the person who treated him sincerely.
