The story begins on an island in China where a man and his son are fishing when they encounter a mutant shark that has the ability to move underground. The shark, which was created in an underwater laboratory by a scientist named Dr. Viter, has a substance in its body that can cure cancer. However, the shark escapes from the laboratory and begins to attack people in the nearby city.
The shark, despite being male, is expecting a child. The scientists realize that the shark has received an overdose of the substance they injected it with, causing its DNA to change brutally. The shark breaks the laboratory glass and covers the place with water. The group of workers, including Dr. Viter's daughter, manage to escape to another cabin in the facility.
The shark, despite being stiff from the anesthesia, continues to attack the group. They manage to trick the shark into following it to a lagoon where it remains trapped in the water. The group discovers that the shark's genes were with those of an earthworm, explaining why the shark can move underground and reproduce alone.
The group is then attacked by soldiers under the command of General Davis. The shark is eventually caught and brought back to the laboratory. Dr. Viter, who is responsible for the shark's creation, plans to use the shark's genes to create a biological weapon. However, the shark wakes up and attacks the soldiers, causing chaos and confusion.
In the end, the shark is destroyed by a missile launcher, and the group manages to escape. The story concludes with a hint of a sequel, "Junior's Revenge".
Here are the key facts extracted from the text:
- 1. There is a mutant shark that can move underground and has the ability to reproduce alone and heal its wounds.
- 2. The shark was created by Dr. Viter, who altered its DNA with a substance that can cure cancer.
- 3. The shark escaped from an underwater laboratory and attacked several people on an island in China.
- 4. Song, a shark hunter, and Jessi, a scientist, tried to stop the shark with the help of some soldiers and a missile launcher.
- 5. Dr. Viter was killed by his own creation after he revealed his plan to use the shark's genes for a biological weapon.
- 6. The shark was finally destroyed by a missile shot into its mouth, but its offspring was still alive.