In the trailer, Akai took his little friend Longjiao, underpants and his new friend Lalaji to Haibeng Island. They met aliens, mysterious creatures and creepy giant monsters on the island, such as man-eating grass, giant caterpillars, giant spiders, long-haired female ghosts and so on. The life of the Four Chivalrous Men is crucial, but they worked together and United to finally defeat external forces, which can be said to be a lot of things to watch.