A young woman named Jean is stranded on a desert island with her friend Brad, but he dies soon after. Jean tries to survive on the island, using her wits to find food and shelter. However, she soon discovers that she is not alone, as a half-human shark starts to hunt her. Jean uses various tactics to evade the shark, including using a tree as a lookout point and creating a trap. Eventually, she is joined by two friends, Lucas and another boy, but they are initially skeptical of her warnings about the shark. As the shark continues to attack, Jean and Lucas try to escape the island, but the shark follows them and they engage in a fierce battle. In the end, Jean emerges victorious, killing the shark by stabbing it multiple times and then roasting it over a bonfire.
Here are the key facts extracted from the text:
1. A girl named Jean wakes up on a desert island with her friend Brad.
2. Brad is injured and Jean tries to give him water, but he dies.
3. Jean finds a backpack with supplies and a cooler with food and drinks.
4. She uses palm leaves to make a shelter and finds a camping tent.
5. Jean goes fishing and finds a dead shark on the beach with a wound in its stomach.
6. She is scared and doesn't know what animal killed the shark.
7. Jean sees a plane passing over the island and tries to signal for help using a flare gun.
8. The plane doesn't see her, and Jean is left alone on the island.
9. A humanoid figure emerges from the sea, and Jean is frightened.
10. The figure is revealed to be a half-human, half-shark creature.
11. Jean tries to escape from the creature but is trapped.
12. She finds a suitcase floating in the sea and takes it to the shore.
13. Jean uses the suitcase as a makeshift boat, but it doesn't work.
14. She hangs a dead shark from a tree as bait for the human shark.
15. The human shark is attracted to the bait, and Jean hides in a tree trunk.
16. A plane passes over the island again, and Jean signals for help.
17. The human shark is distracted by the plane, and Jean escapes.
18. She finds a ball with photos of her friends who were also on the island.
19. Jean sees that her friends are acting suspiciously and discovers that they are working with the human shark.
20. Jean's friends try to stop her from leaving the island, but she escapes.
21. She finds a floating boat and prepares to leave the island.
22. The human shark attacks the boat, but Jean's friend Lucas fights it off.
23. The shark takes Lucas underwater, but Jean saves him using a knife.
24. Jean and Lucas escape from the island, and the human shark is left behind.
25. Jean creates a bonfire and cooks the shark's body.
26. The movie ends with Jean escaping from the island and the human shark being defeated.