After ten years of confinement in the imperial mausoleum, Xiao Yu, the orphaned son of a deposed crown prince, is regarded by the entire capital as a mad, useless fool and sent to the Princess Royal's residence, where anyone can humiliate him.
No one knows he is the secret regent entrusted by the late emperor: he holds a handwritten secret edict, commands three thousand shadow guards, possesses half of a military tiger tally, and has knowledge from another world at his disposal.
Censors impeach him? He strikes back by confiscating their estates and sentencing them.
The chancellor frames him? He beheads the man's trusted accomplices.
An enemy nation invades? He dons his armor and sweeps through its armies.
He melts his cousin's icy heart and wraps an arm around his cold-blooded guard's slender waist.
He will clear his father's name, reform the court, and usher in an age of peace and prosperity.
You're crazy to provoke him? He's the regent the late emperor kept hidden!