A family, including Guy, his wife Prisca, and their children, 30 and Maddox, go on a vacation to a beautiful but mysterious island. Unbeknownst to them, the island has a strange effect, causing people to age 40 years in one day. As the day progresses, the family and other tourists experience rapid aging, health problems, and even death. The group discovers that the island is being used by a pharmaceutical company to test the long-term effects of their medications on people with diseases. The company uses the island's unique properties to accelerate time, allowing them to see the effects of their drugs over a short period. In the end, 30 and Maddox manage to escape the island by using coral to protect themselves and return to the hotel to take revenge on the people responsible. The film ends with the police denouncing the laboratory and taking the siblings home to live their adult lives.
Here are the key facts extracted from the text:
1. A family, including a man named Guy, his wife, and their children, go on vacation to a luxurious hotel on a paradise island.
2. The family meets a doctor and his family, as well as a rapper and an epileptic woman, on the island.
3. The group discovers a mysterious beach on the island that makes people age rapidly.
4. On the beach, the group finds the body of a young woman who had been swimming naked.
5. The group tries to leave the island, but they keep getting drawn back to the beach.
6. As they spend more time on the beach, the group starts to experience rapid aging and health problems.
7. The group discovers that the beach has a special magnetism that causes rapid cellular deterioration.
8. The group tries to escape the island, but they are thwarted by the hotel staff, who are working with a pharmaceutical company to experiment on them.
9. The company is using the island to test its medications on subjects with diseases and see the long-term effects.
10. The company's goal is to develop drugs that solve various pathologies.
11. Two of the children, 30 and Maddox, escape from the island through a coral reef and return to the hotel to take revenge on the people responsible.
12. The police eventually denounce the laboratory and take the two children back home to live an adult life.
13. The film ends with the two children returning home, despite having experienced rapid aging on the island.