To the left and right of a door are two worlds, two dynasties, and two people.
Sixteen-year-old Su Wei has a secret that no one can tell. She has a very good friend named Wei Su.
His life will end forever in the winter of the twelfth year of Bingsheng - he will die in front of the enemy's battlefield, pierced by thousands of arrows.
That year, he was only twenty-eight years old.
Intention: Even small people should grow towards the sun.