Xiao Jue, the eldest grandson of the Xiao family in the capital, fell from the clouds into the mire overnight. During the family power struggle, he was framed by his uncle and charged with treason. His father died tragically, and he fled to the end of the world with scars all over his body.
On the way to escape, he was rescued by Su Wan, a girl from the Su family in a small southern town. During the days of recuperation, two people with very different identities unexpectedly fell in love. However, when the pursuers were approaching, in order to protect her, Xiao Jue left a token and refused to leave, not knowing that Su Wan was pregnant with his flesh and blood.
For more than ten years after that, Xiao Jue fought bloody battles on the chaotic border, transforming from an unknown soldier into the "Black Dragon King" sweeping across Europe, Asia and Africa. No one dared to resist wherever he went. He was a conqueror who made the world tremble, but when he dreamed back at midnight, he always thought of the gentleness of that small southern town.
When he accidentally learned that Su Wan had given birth to a son for him and raised him alone for ten years, the frozen corner in Xiao Jue's heart suddenly collapsed. This king who once established his power through killing chose to put down his authority, take off his armor, and return to the city.
On the way back, he not only had to face the remaining forces of the Xiao family in the capital, but also had to learn how to be a father and a husband. The blood feud of the past was intertwined with the warm bonds of today. In the end, the "Black Dragon King" found a destination that was more important than conquering the world in his ordinary guardianship.