逗号在对突然出现的史前文明高能晶体展开调查时，意外唤醒了被封印的巨型海怪，海怪开始吸取地球所有的能量，地球危在旦夕！危机关头潜艇探险队在史前文明守护金刚的帮助下，再次封印了海怪，保护了地球的安宁。

　　Centuries before the world's oceans became a global trade highway, Chinese seafarers set sail to faraway lands to exchange commodities. Now, Historian Sam Willis retraces the golden era of maritime trade to uncover a legacy that culminated in one o