A group of people on a cruise ship are suddenly attacked by a mutated shark crossed with an octopus creature.

The surrounding areas of the Devil's Sea is also known as the Bermuda Triangle of Asia. Due to electromagnetic interference, aviation accidents are common in the region. Lin Hao and his daughter Yi are passengers of Flight GZ261. As it flies over the Devil's Sea, the plane malfunctions, causing an emergency landing on a crocodile island. Hao and other driving passengers encounter enormous sized crocodiles and spiders and engages in a battle for survival. When Yi is captured by the giant beasts, Hao fights for his life to rescue her daughter.

The soldier king Qin Yang's fiancée Ye Qin met with an unknown beast and died tragically. Gu Ping invites him to participate in Ye Qin's scientific research before her death. But Gu Ping is using Ye Qin's research results to combine the genes of unknown beasts to create the "Zero" dragon creature. The intelligent dragon creature, coupled with the extra-terrestrial beast evolved by devouring, an imminent city war is coming...

Ten years ago, Zhang Yifan, the captain of the rescue team, took his family to the beach for a holiday. Unexpectedly, a typhoon broke out. On the way back, he encountered a car accident. Zhang Yifan tried his best to rescue the injured, and did not want his son Zhang Yitian to be accidentally killed by a landslide. Over the past ten years, Zhang Yifan, who was deeply remorseful, was depressed, quit his job as a rescue team, and opened a car repair shop. Son's death made him nervous....

The film tells the story of the sleeping ancient giant monster Kui Niu who was accidentally awakened by people. After waking up, the monster showed powerful destructive capabilities. Its existence seriously threatened people's safety. Although the superior prefect organized troops to deal with it, people faced with the giant beast and had various doubts about why the giant beast came. Aning's investigation also made the secret emerge. It turns out that all this is the evil consequences of people's own making.