Su Xiao, the king of spies, transmigrates into the body of an eight-year-old girl, the least favored and most disposable daughter in the Marquis's household.
The original owner is about to be pushed into an icy lake by her legitimate older sister, who wants to eliminate her and make room for the heir.
Su Xiao looks at her short little limbs and is considering switching to a strategy of outsmarting her enemies when a mechanical voice suddenly rings out in her mind:
[Ding! Spy Support System activated. Host, please complete the first step: cry right where you are to lower the enemy's guard.]
The next second, she bursts into tears, even producing a perfectly timed snot bubble.
Her older sister sneers and reaches out to push her.
Su Xiao takes the fall, and a hair-thin anesthetic needle lands precisely in her sister's ankle.
System: [...Host, that's not how the script goes.]
Su Xiao wipes away her fake tears and speaks in a childish voice:
"Sorry, occupational hazard. Reflex."
Later, the Crown Prince is ambushed and trapped, and everyone thinks the situation is settled.
But then a little dumpling of a girl rides a wild dog straight into the encirclement. What she flings from her baby bottle is a powerful drug that can paralyze a whole crowd in an instant.
Su Xiao lifts her little face and holds out a hand to the stunned Crown Prince:
"Give me candy and I'll save you. No candy, and I'll save you anyway, but you have to pretend I melted your heart with my cuteness."