The Dimension Transmitter is still in the experimentation stage. However, there is already contact with the eighth planet of the Vega system. With cameras and probes, data were collected from that planet. On the moon base, Ralph Common is lured into the Dimension Transmitter by a "telepathic voice". He overrides all safety locks and is transported to the Vega planet, where he is detained by the locals. Professor Common asks Commander Perkins and Major Hoffmann to bring back his son to the moon. They succeed; however, Ralph Common tells them that there must be a connection between Earth and Vega, since there are maps showing the area of the Mediterranean Sea. Communication with the Vegans is not yet possible, with the exception of the "Telepathic Voice", which only Ralph can hear.