The Turtle Island

In search of his missing older brother, Wang Mian goes out to sea, only to sail into a violent storm, narrowly avoiding losing his life. During that moment of danger, a magical island mysteriously appears, and he, alongside with the other passengers on his ship, sail to the island to seek shelter.
The magical island is idyllic. With the fairy Yun Zhi welcoming her guests on behalf of the island's owner, other beautiful fairies and a beautiful landscape, and even a delicious night feast, the passengers slowly forget the danger they are in. However, in the middle of the night, Wang Mian finds out that the owner of the ship is acting suspiciously. During his pursuit, he accidentally witnesses someone attacking Yun Zhi. Wang Mian rescues Yun Zhi heroically, but finds out that his brother's disappearance has something to do with this magical island, and the guests of the island are disappearing one by one...
(Source: Baidu Baike, zest at MDL)
~~ Adapted from the short story "The Island of the Immortals" (仙人岛, Xian Ren Dao) of the novel "Strange Tales from a Chinese Studio" (聊齋誌異) by Pu Song Ling (蒲松龄).