Derek and Margo, two young archaeologists, are on a dig accompanied by �their nomad friend�, a boy named Moki. They come across a door in an ancient ruin that turns out to be a portal through time. Though the introduction is the same in all videos, each episode sends the three friends into a different story from the Bible. They often interact with principal figures from each story, but without any significant effect upon the plot so as not to alter the course of history; in other episodes, they arrive decades after the events depicted in the Bible and are relayed the story by a firsthand witness.
 
The episodes were not released in an order consistent with the Biblical chronology, but can be construed to give a coherent story beginning with �The Creation� and ending with �The Easter Story�, which is told from a Christian viewpoint. The first six episodes, released simultaneously, relate Old Testament (Hebrew Bible) stories, with episodes pertaining to the life of Jesus being added among some additional Old Testament stories as the series progressed.
 
Each individual episode featured celebrity voices in principal Biblical roles.