While seeking to solve the mystery of " the trained vampire murders," Doc Savage and his amazing crew suddenly find themselves prisoners of Sol Yuttal and Hadi-Mot aboard a hijacked Zeppelin. Their deadly destination is a fabulous lost diamond mine guarded by carnivorous plants and monstrous, bloodsucking bats.
A vile greenish vapor was all that remained of the first victim of the monstrous Smoke of Eternity. There would be thousands more if Kar, master fiend, had his evil way. Only Doc Savage and his mighty five could stop him. But the corpse-laden trail led to mortal combat with the fiercest killing machines ever invented by nature.
