All Pilot David Randall (Richard Derr) knew when he was tasked to deliver photos is that they were important. What he didn't know was how much his life would change by completing this mission. Facing complete destruction from runaway planets on a collision course with Earth, Doctor Cole Hendron (Larry Keating) and his equally talented daughter Joyce (Barbara Rush) must cast aside the skepticism of their peers and seek the help of tycoon Sidney Stanton (John Hoyt) to build a new ark that will insure life continues on a new planet. As the day grows closer and the world becomes aware of impending doom, the only hope for survival rests on a lottery to select the handful of people who will try to escape Earth before the massive planet Bellus tears their planet apart.