In the third year of the reign of Emperor Yong, the sea frontier collapsed and bandits broke out.
The young emperor Xiao Yan was constrained by his aristocratic family inside and pressured by maritime troubles outside. In order to control the maritime affairs in the South China Sea, he was forced to marry Su Wan, the daughter of a maritime merchant.
She, the helmsman of the Su family, is good at reasoning, knowledgeable about maritime affairs, and as meticulous as a hair. She has not forgotten the tragic death of her father for seven years, and she hates the imperial court's maritime ban.
He, the cold and taciturn young emperor, was suspicious and guarded, and regarded her as a pawn. He disliked and distrusted each other.
When they first met, they were tit for tat and hated each other extremely.
The princess who got married died suddenly in the secret room, the village was massacred strangely at the port, the guards died tragically in a series, the Taifu died mysteriously...
A series of unsolved cases tied the two people to the same boat.
From being wary of each other to being forced to join forces; from being cold-eyed to being entrusted with life and death.
She investigates mysteries, solves conspiracies, and controls the sea;
He cleans the emperor's side, sets the direction of the court, and protects his family and country.
In the deep palace chess game, the secrets of twenty years of blood are revealed layer by layer.
When Qianfan passes by, the sea, Yan and river are clear——
He stands in the imperial palace, and she guards the sea.
The emperor's boat sails together, and there is no country without you.