On a day when the sun was shining all over the earth, Ye Tianyu sat in the small yard of his house near the seaside, holding a shabby ocean adventure book in his hand, staring closely at the mysterious underwater world described in the book. His mind was filled with strange deep-sea creatures, ancient treasures sunk at the bottom of the sea, and unknown civilizations hidden under the waves. Ye Tianyu is a young man who is full of endless curiosity about the sea. In his eyes, the sea is like a huge mysterious treasure box that has not yet been opened.