Years ago the mermaid Xi Yin saved the Imperial guard Yan Lie. They fell in love, but the mermaid returned the ocean. It was rumored that the mermaid has a magical treasure, and Imperial concubine Shen Mei wants to claim this, at any cost.

Chen Wangdao returns from his studies in Japan and takes on the task of translating the Communist Manifesto, which changes the course of his life.

Lin Dawei, an assistant to the county government, needs money to feed his family. Lin is persuaded by his colleague Lu Qian to steal Jin Mantang's gold. Ten years later, the emperor's eldest son was born, the emperor pardoned the criminals, and Lin Dawei returned home. However, things did not go well in his hometown. Jin Mantang joined forces with smugglers to kill thousands of people. The swordsmen that Lu Qian sent to kill Jin Mantang were destroyed, and Taiping was in danger.

The film tells that in ancient times, the emperor Ming sent Dongchang Supervisor Gao Dehai to lead a fleet to the East China Sea to seek the fountain of youth. Unexpectedly, he was attacked by a dragon on the way, sunk the ship accidentally, and the fleet strayed into the deserted island to take an adventure. Jin Yiwei's guard Yan Lie came across "the last shark man in the world"—the beautiful and kind Xiyin, and the story of his love with Xiyin

Zhang Yingchuan, a descendant of the Faqiu clan, took his niece Ono to live in seclusion after an accident when he was visiting the grave to find medicine.

During the Mid-Autumn Festival, graduate student Hu Yang reconnects with his former classmate Nan Xiaoyan in their seaside hometown. Their growing relationship faces unexpected challenges that test their love and resilience.

According to a legend, there is a secret treasure "Dong Tian Yi" in Tang Sect. It can predict a list of wicked people in advance and punish them before they do evil. However, Tang Wuyan’s name, Tang Wuyan’s new head, also appeared on Dong Tian Yi, and was forced to flee. Tang Wuyan met the kind-hearted thief Chu Chen. With him, she decided to return to Tang Sect and destroy him. The culprit, the armillary sphere, regains control of their own destiny.