Not so long ago, mysterious structures called Dungeons began appearing all over the world. No one knows what they are or how they came to be, but adventurers and armies around the world instantly took interest in them. Thousands set out to explore the Dungeons, but so far, not a single person has returned. In a Parthevian port, a young boy is about to make a name for himself. Sinbad is good-natured, strong, and cravi...