In a breathtaking Italian town, Luca, a young boy, embarks on a thrilling summer adventure. With newfound friends and a renewed sense of confidence, he explores shimmering waters and learns to navigate the complexities of his dual existence. Luca and his friend Alberto share a special secret they are sea monsters from another world hiding behind their human facades. As they forge connections with kindhearted locals and uncover the town's secrets, they must also protect their true identities from those who fear their mythical nature. Will they find acceptance and navigate the challenges of their secret lives?