While sailing toward Grand Cayman Island in the Bermuda Triangle, a team of university scientists encounter a strange green cloud which causes them to be shipwrecked on an uncharted land mass. Dr Fred Walters, marine biologist Paul Jordan and his son, Scott are among the survivors They encounter a human named Varian, a man from the 23rd century whose trail crashed on the land mass. Varian, explains that different time spheres exist simultaneously in this strange land, and that by moving eastward one travels Into the past, present and future. The Jordan party and Varian face danger from a group of 16th century British privateers who take some of them hostage. Then, three citizens of Atlantium, a city containing the survivors of the lost continent of Atlantis, have their own plans for them.