The main character dies in a plane crash and wakes up inside the body of a girl named Go-gyo.
She finds herself in So Kingdom, a fictional dynasty where peace and hidden schemes exist side by side.
All Go-gyo has left from her past life is her modern knowledge and a medicine box.
This medicine box contains an unlimited supply of whatever medicine she needs.
Even if she uses everything inside, it magically refills the next day.
It also creates new medicines depending on the situation.
Using this mysterious medicine box, Go-gyo opens a small clinic and begins working as a healer.
But conflict follows her in every life—past and present.
She treats those who need healing,
and for those who need a fist… she gives them one.
In this way, Go-gyo solves the many crises around her.
