The movie is about a group of friends who attend a couples therapy session on a remote island, Isla Corazón, in Mexico. However, their session is disrupted by a 6-headed shark that starts attacking and killing them one by one. As the group tries to survive and escape the island, they discover that the sharks were created by scientists who experimented with them in a nearby laboratory. The group eventually discovers that the only way to kill the sharks is by hitting them in their hearts. After a series of intense and deadly confrontations, the group manages to defeat the sharks and escape the island.
Here are the key facts from the text:
1. The story takes place on an island in Mexico called Isla Corazón.
2. There is a marine biology school on the island.
3. A girl sees a fin coming towards her and a shark eats her.
4. The main characters are introduced, including William, a love therapist, and his students Jake, Sara, James, Angie, Daphne, Brad, and Rebecca.
5. William is giving couples therapy to the students.
6. The students are tasked with retrieving supplies from a boat.
7. Brad and Rebecca go to the reefs to retrieve the supplies.
8. They are attacked by sharks, and Brad's body is found.
9. The students panic and try to escape the island.
10. They discover that the sharks are regenerating their heads.
11. The students find an abandoned laboratory where they learn that scientists were experimenting with sharks to find a way to transmit regenerative cells to humans.
12. The students realize that the only way to kill the sharks is by hitting them in their hearts.
13. A storm is approaching the island, and the students seek shelter in the laboratory.
14. They try to escape the island but are pursued by the sharks.
15. They use gas tanks to try and kill the sharks.
16. James gets jealous and tries to shoot William, but the shark intervenes and eats James.
17. The students use a spear to try and kill the shark.
18. The shark gets tangled with the gas tanks and explodes.
19. The students escape the island, but not without some of them being killed by the sharks.