A conspiracy, both of them thought the other had died tragically.
She is the ace "Ghost" of the Dark Night Organization, who kills decisively and only seeks revenge;
He is the heir to a reclusive family, pretending to be crazy and acting stupid, and plotting things secretly.
Reunited three years later, she sneaked into a wealthy family to work as a nanny, closely guarding her "silly" old friend.
He sees through things but doesn't reveal them, and uses madness as a shield to protect her identity as a killer from being exposed.
When the mask is torn apart and the identity is exposed——
Former lovers become strongest partners,
Tear the enemy with your hands, overturn the old order,
This time, I will stand side by side with you and kill everyone who harms us!
Purpose: In the shackles of conspiracy and fate, use forbearance as armor, use deep love as faith, protect each other in both directions, and redeem each other, finally break free from the shackles of power, and regain oneself and life.