In a small coastal town, where summer feels eternal and secrets lie buried beneath the sand, a group of teenagers stumbles upon an ancient book in an abandoned cabin. At first, it seems like a simple curiosity, but they soon discover that each page has the power to bring local legends to life. When they accidentally invoke a sea monster that had been locked away for generations, the tranquility of summer turns into a delightful chaos.
As the monster begins to interact with the young people, they reveal that it has a tragic and mysterious past. Instead of being a threat, the monster becomes their unexpected ally, leading them to explore the town's history and the secrets its inhabitants have kept in the dark. However, not everyone in the town is happy with the presence of this creature, and a group of monster hunters sets out on a quest for revenge that could endanger both the kids and the monster itself.
With the span of a summer ahead, the protagonists must learn about friendship, sacrifice, and the importance of accepting what is different. Combining laughter, heartfelt moments, and adventures accentuated by the magic of the unknown, the story reminds us that sometimes the real monsters are not those who seem to be, but the prejudices we carry within.