10/06/1974  Jumping Into a World of Mysteries

A boy (Sakaki, Jiro) and a girl (Yurika) are allowed to visit a lab where cryogenics is being researched. They witness a monkey being unfrozen.

Later, Jiro climbs into one of the cryogenic chambers. He's told to get out (I think) but a volcanic eruption causes an earthquake which seals him in. As the building is falling apart the lady lab assistant (Izumi, Katsuko) places Yurika in a cryogentic chamber to protect her, then enters one herself. Falling debri activates the chambers, so the woman and two children are frozen. The earthquake destroyes the lab, buring the ruble under tuns of rock, but the steel capsules survive.

Time passes, Eventually the three capsules are dug up and taken to another location where the three people are defrosted. They're horrified to find themselves in the hands of apes who walk upright like men and wear clothing. The three humans are about to be executed when a voice orders their release.

Thinking a human male has come to their rescue they're happy until they discover it was actually an inteligent talking ape and that he's no more friendly than the others. The three humans are tossed in a cell.