Beautiful time traveler Leela Zenken, searching for atomic power to save her people of the future, is aiming for 1985, but hits 1935 instead where hiker John Harling tries to help her.

After a passing comet throws the earth’s axis out of kilter, the survivors, searching for a habitable spot to live on the planet’s surface, stumble upon a colony from the lost continent of Mu, whereupon war breaks out (after all, there’s limited land available now) and the Muians have a time-travel trick up their sleeves.