One quiet night, a boy named Arin stood near the beach, looking at the endless sea. The waves were calm, but something about the ocean felt strange, as if it was hiding a secret.
Arin loved the sea since childhood. Every evening he would come to the shore and watch the sunset. But that night was different. Suddenly, he noticed a soft blue light glowing deep inside the water.
Curious and a little nervous, Arin walked closer to the waves. The glowing light slowly came nearer until he saw a small glass bottle floating on the water. Inside the bottle there was an old map.
Arin opened the bottle and unfolded the map. At the top it was written:
"The Secret of the Inside Sea."
The map showed a hidden place deep under the ocean where an ancient city was believed to exist. Legends said that whoever discovered the Inside Sea would uncover the greatest mystery of the world.
Arin looked at the dark ocean again. He knew that this discovery could change his life forever.