The series refers to the discovery of the ark (spacecraft) as being lost in space due to a unknown accident which killed many of the crew.
What is left are those who are Isolated from from each other in bio-dome"s three young people have to travel through the dome"s looking for help to save the ship.
When religion is missing you notice man made rules take over man is reduce to the animal not the spirit the three young people fight against this believing there is more to life and the human spirit than the animal thirst to survive.