he Traveler receives a cryptic letter sealed with the crest of the Knights of Favonius. The letter, from Kaeya, speaks of a hidden island off Mondstadt’s coast, said to appear only once every hundred years. Intrigued by the mystery, the Traveler sets off to meet Kaeya, not knowing that they will be thrust into an adventure beyond their imagination.

When the Traveler reaches the island, the skies above are a stormy swirl of dark clouds, yet the island itself remains calm, as though it is untouched by the chaos above. Kaeya stands at the shore, his usual mischievous grin replaced by a rare serious expression.

"So, you finally made it," Kaeya remarks with a hint of relief, but there's an edge to his voice. "I was starting to think the storm would keep you away."

Before the Traveler can respond, the ground trembles beneath their feet. The once tranquil island begins to shift, as if awakening from a long slumber. Statues, once dormant, now glow with an eerie light, their eyes following every movement. It becomes clear that the island is not a peaceful place—it is a forgotten temple, hidden away for a reason.

Kaeya leads the Traveler into the depths of the island, through maze-like corridors covered in strange markings, and past crumbling pillars that whisper of ancient power. As they venture deeper, the air grows thick with magic, and whispers of long-lost secrets fill the silence. They come upon a vast chamber, its walls lined with murals depicting a storm god, a deity long banished by an ancient order.

Kaeya's eyes narrow as he observes the murals. "This island… it was once a sanctuary for a storm deity, bound by a pact long broken."

The moment his words leave his lips, the island begins to tremble violently, the once peaceful surroundings now pulsing with energy. The storm above rages, a massive tornado forming in the sky. The Traveler and Kaeya find themselves face to face with the remnants of the deity’s power—its fury now unleashed upon the island, seeking to break free..