The story revolves around Luca, a sea monster who lives with his family at the bottom of the ocean. He befriends Alberto, another sea monster, and together they dream of exploring the world above the sea. Despite his parents' warnings, Luca and Alberto venture to the surface, where they transform into humans and meet a girl named Giulia.
The trio forms a strong bond, and Giulia helps them prepare for the annual Portorosso Cup, a triathlon competition. However, their friendship is put to the test when Alberto becomes jealous of Luca's growing closeness to Giulia. Meanwhile, Luca's parents search for him, and Ercole, a bully, tries to hunt down the sea monsters.
On the day of the competition, Luca and Alberto's friendship is rekindled, and they work together to win the cup. However, their secret is revealed, and the townspeople, including Ercole, try to hunt them down. Giulia and her father, Massimo, come to their defense, and the townspeople eventually accept the sea monsters as part of their community.
In the end, Luca and Alberto win the cup, and Luca's parents are proud of him. The story concludes with Luca and Alberto saying goodbye to Giulia as she leaves for Genoa, and Luca's family allowing him to attend school with Giulia.
Here are the key facts extracted from the text:
1. The story is about a sea monster named Luca who lives in the ocean.
2. Luca's parents do not allow him to go to the surface because they are afraid of humans.
3. Luca meets a friend named Alberto, who is also a sea monster, and they share many adventures together.
4. Luca and Alberto go to the surface and become humans.
5. They meet a girl named Giulia, who is a human, and she becomes their friend.
6. Luca and Alberto enter a triathlon competition, which includes swimming, biking, and eating pasta.
7. They face challenges and obstacles during the competition, including a rival named Ercole.
8. Luca's parents are searching for him and are worried about his safety.
9. Alberto's father abandoned him, and he has been living alone for many years.
10. Luca and Alberto win the triathlon competition, and as a result, the humans in the town begin to accept them as friends.
11. Luca and Alberto become the winners of the cup and the fishermen no longer want to hunt them.
12. Luca's parents arrive and are proud of everything he did and how they are the winners of the cup.
13. Luca and Alberto get a Vespa as a prize, but Luca forgets his dreams of going to school.
14. Luca says goodbye to Giulia and goes to live with her and her mother in Genoa.
15. Alberto sells the Vespa to buy a ticket to Genoa to be with Luca.
16. Luca's family arrives to tell him that he must go to school and live with Giulia and her mother.
17. Luca and Alberto say goodbye to each other, and the movie ends with them turning into monsters in the rain.