Hu Bayi and Fatty Wang had taken off their gold-touching charms and planned to go abroad with Shirley Yang. At this time, they were entrusted by Professor Chen to go to the coral spiral in the South China Sea to search for the long-lost...The national treasure of the Qin Dynasty is the bone mirror of the King of Qin.They bought a "Ghost Ship" Trident on Coral Temple Island, which had powerful facilities but no one dared to use it. They also met the three Dan people, Ruan Hei, Guchai and Duoling, as masters and apprentices, and went to sea together.After experiencing various sea wonders and fighting ghost ships, the group finally entered the mysterious and dangerous coral spiral sea.After several explorations in the water, Hu Bayi roughly determined the location of the sunken ship carrying the “Qin Wang Bone Mirror”.But at this time, the moon coincided with the full moon, and the dark fire on the seabed rekindled, and the eyes of Guixu Sea opened, sucking them into the strange Guixu Sea Cave.Guixu is like a magical "sea under the sea", isolating the upper seawater like a huge transparent bubble.Although everyone narrowly escaped death, they didn't know how to return to the sea.When they were desperate, they discovered the giant sunflower tree left by the Hentianguo clan.Hu Bayi and Shirley Yang decided to use the Yemu trap to fight to the death and lead everyone to escape from Guixu and return to Coral Temple Island.