Lan Yanxin, the leading figure of □□, was born with cancer. The person who was sentenced to death turned into a person with unlimited cell division due to a car accident. She was too smart and wanted to save her sister who had stopped breathing. She met the six members of the idol group A-T-Z, namely Yin Zhengxuan, Jingchuan, Hanze, Ling Zhongxian, Shang Mo and Shen Yifan. What she was looking for happened to fall into their hands, so she came to them as a nanny and bodyguard. Lan Yanxin, whose only personal emotions are pure family affection, gradually realized the joy and pain of getting along with people while living with Yin Zhengxuan, Jingchuan, Han Ze, Ling Zhongxian, Shang Mo and Shen Yifan. Things that make people laugh are constantly happening in their lives, but because of their special backgrounds, there will always be some frightening inconsistencies in their lives. When Yin Zhengxuan, Jingchuan, Han Ze, Ling Zhongxian, Shang Mo, and Shen Yifan passed through one difficulty after another with Lan Yanxin, they gradually regarded the person who suddenly broke into their lives as an irreplaceable existence. However, in the end they found that their lives had been unknowingly changed by others. Control, and what made them collapse was that the person who controlled them was Lan Yanxin, who didn't even know what to use for cooking at the beginning. When everything settled, they had lost the chance to redeem themselves, because they witnessed the person who had lost everything repay the debt she owed with blood.