Ace Agent Gui Jianchou lurked for three years to complete his mission, but when he returned, a three-year-old girl was sitting in the apartment. DNA testing confirmed that she was his biological daughter - she had a one-night stand with a female guide code-named "Camellia" during an overseas mission three years ago. The mother of her daughter Xiaoguai is no longer here, and she comes to the door with a strange ability called the "Almighty Cub System". The system can be transformed into toys such as magic wands and luminous unicorns. It can also predict the father's actions and read mobile phone information. Xiaoguai uses the system to make the refrigerator TV sing "Two Tigers" as an alarm clock, and uses a lollipop to activate "Social death must be shot". Guijianchou was forced to balance raising a child and performing tasks, but found that the creation of his daughter was no accident - the disappearance of "Camellia", the real reason why he was transferred back to the country, and the origin of the system in his daughter's brain. All clues pointed to a shocking conspiracy. As the combination of a three-year-old cute baby and a cold-blooded agent makes more and more jokes, the father and daughter have stepped into a bigger whirlpool step by step.