Matt Ellman, a war correspondent, witnessed the darkest side of human nature, but he still maintained an optimistic attitude towards life. One day, a human bomb killed Matt and his fiancée Jessie Machalan. But they woke up separately in another world. There lived all the humans who had ever existed on Earth, and it seemed that they were "reborn" in this world after death. There was an endless river in that world, and people could only live on the river bank. No one knew what was on the other side of the river. In order to find Jessie, Matt formed an alliance with American novelist Mark Twain, 13th-century female warrior Tomoe, and 15th-century socialite Allegra, and embarked on an adventure. They rode Mark Twain's paddle wheel upstream to explore the source of the river and gradually uncovered a shocking secret. Under the guidance of the mysterious administrator of the Styx, they went through the cave of suffering and underground prisons, witnessed countless tortured souls; took a Zeppelin airship driven by a German engineer, soared in the endless sky; the famous explorer Richard Francis Burton became a villain in the play, trying to help the Spanish conqueror Francisco Pizarro occupy and destroy the entire Styx. For Matt. Every day faces new secrets and challenges. What exactly is this place? What happened to the earth? What does the burning ball mean? What power is hidden in the infamous Dark Tower? Why are their every move closely monitored by some alien creatures? All these questions can only be answered at the source of the Styx. This story was filmed once many years ago, but the story was not finished. Both the old version and the new version are adapted from the novel of the same name.