She is the secret legitimate daughter of the Li family. She has been hidden behind the palace wall since she was a child, and is unknown to anyone.
During an autumn hunt, she put on her brother's battle robe and entered the palace on his behalf, just to retrieve the antidote and save her master's life, then left immediately.
She thought she could come and go without a trace.
Little did they know that that night of escaping in the dense forest, embracing each other in the water, and hiding side by side in the city for several days, had quietly rewritten their fate.
The poison quietly penetrated into her bones, but she didn't know that her heart palpitations were not all caused by love poison.
Heartbeat precedes pain, attachment precedes consciousness.
Concept: A sword is easier to use than a hairpin