After transmigrating into the role of a publishing house owner's daughter, Shen Nian faces her first problem: her second uncle arrives with officials to demand repayment of a debt.
She promptly pulls out the account book and reads out what her uncle and the officials owe. Peace and quiet are restored.
But among her father's belongings, she finds an embroidered piece with strange stitches, along with a secret intelligence organization called the Bluebird Bureau.
To investigate her father's death, she disguises herself as a man and slips into a poetry gathering in the capital. She intends to keep a low profile, but a playboy provokes her, a princess takes an interest in her, and a cold-faced prince silently protects her.
When her arguments leave the entire gathering speechless, a pair of eyes in the shadows fixes on her.
She doesn't know that the person watching her is her father's killer.
She knows even less that he had a chance to kill her, but hesitated because of what she said...