When two planetoids are discovered to be hurtling directly at Earth, scientists (Larry Keating & Richard Derr) must quickly construct a ' Space Ark' which will take 40 lucky people
- chosen by lottery
- to a new, Earth-like planet. As the collision date draws ever nearer & catastrophes strike in the outside world (including tidal waves in New York), the travellers must cope with a revolt on the part of those left behind.