In the spring of 1421, Zheng He launched his sixth voyage. At the same time, a warship carrying several death row prisoners drifted into the depths of the ocean. No one knew its location, voyage, or purpose. The prisoners on death row must not only escape from the dangerous and bizarre sea areas, but also solve layers of mysteries, which will put them both physically and mentally to the extreme test. And where should this small boat, which carries the twin mysteries of the times and the world, go?
