In the azure waters of the Azores, two families have been locked in a generations-old feud: the Santos, champions of traditional fishing practices, and the Andrades, whose industrial fleet threatens to transform the island forever.

Nora Santos, the youngest captain on the island, has sworn to protect her family's legacy and way of life. When she finally inherits the Esperança—her late father's fishing boat—she's determined to fight against anyone who threatens the traditions she holds dear.

Finn Andrade carries a secret. Though heir to a powerful fishing empire, he secretly studies marine biology and dreams of sustainability rather than profit. When he discovers a potential wreck of the legendary Santa Catarina, he needs help from the one person who despises him most—his childhood friend turned bitter rival, Nora.

Reluctantly, they form an uneasy alliance: find the treasure together, then go their separate ways. But with each dive, memories of their friendship resurface, and the attraction between them ignites more fiercely than the Atlantic storms.

When they discover a mysterious underwater city, suddenly more than gold is at stake. Their find could not only reconcile their feuding families but also save the fragile marine ecosystem threatened by overfishing. Yet Finn's father will stop at nothing to prevent this discovery—even if it means sacrificing his own son.

As danger mounts both above and below the waves, Nora and Finn must decide what matters most: family loyalty, newfound love, or the secrets hidden in the depths of the sea.

Azure Promises weaves a captivating tale of forbidden love against the breathtaking backdrop of the Azores archipelago, where ancient traditions clash with an uncertain future, and the ocean holds secrets that could change everything.