In 1937, on the coast of the South China Sea, Chen Ahai, a young man from the Dan family, cast down a fishing net with his father on an approaching stormy morning, but what he picked up was a rusty iron box. That night, my father mysteriously disappeared in the smoke of the Poseidon Festival, leaving only a code word, half a sea chart, and a legend about the "Red Sail".
Under the calm Danjia Fishing Port, there are surging undercurrents. In order to find his father's whereabouts, Ahai was forced to break into a hidden world intertwined with saltwater ballads, ancient "Road Book" codes and maritime codes. Here, the navigation wisdom that the Dan family has relied on for generations has become a life-and-death intelligence weapon; beneath the shadow of the fisherman's sail, there is a dangerous red sea lifeline hidden.
On one side is the enemy ship inspection that is approaching step by step, and on the other side is the tradition of the Dan family that is connected by blood. Under the protection of the wise seventh uncle and the brave Li girl Xiuying, Ah Hai must solve the mystery of the "sea pillow" left by his father, steer the ship steady among the waves and lies, and protect the promise that is heavier than life.
This is a legend deeply rooted in the waves of the South China Sea - here is the wandering and tenacity of the Dan family who "use the boat as their home and the sea as their pillow", the mysterious array of maritime maps hidden in the "Roadbook", the thrilling spy battle of the red sail boat crossing the blockade, and the deep love that spans the mountains and seas and shines in the torrent of the times.
When the last red sail returns, he will understand: some waterways are opened with life; and the sea is not only an abyss where secrets are buried, but also a hotbed that holds up hope.
Lie on the sea and listen to the waves, waiting for the sail to return.