On a visit to France, Doctor Boris is hypnotized by an alien and handed a strange substance. Unknown to him, this substance is a crude form of the legendary philosopher's stone-a drug that can cure all diseases and postpone life indefinitely. However, as he refines the stone Dr Boris discovers that it is also a portal that will soon open up the earth to an extraterrestrial invasion from the core of Mars. Will Dr Boris give up his new found immortality to save the earth? Will the stone be destroyed or will the earth be instead? Another breathless adventure from the author of 'Double Bill'.
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