As Alex's sight deteriorates, his family are anxious to find help for him. Help comes from a rather unexpected source- that of an intelligence with a Jekyl and Hyde persona. But the evil side escapes and starts terrorising Britain; and so, their holiday cancelled, the Hulcroft family are forced to find androids and frogs in Cornwall, and then fight them on their home planet before being blasted into an alternative reality... The question to the real home of the Frogs is answered - and the answer is very unpleasant...