Pursued by detectives, Johnny Walters leaves the city to visit his family in a small California town. Among the household: his dead brother's luscious widow Helen, who soon is attracted to him. Ominous events and conflicting evidence leave Helen suspicious, but uncertain about her brother-in-law as tension builds...

Submarine commander Ken White is forced to suddenly submerge, leaving his captain and another crew member to die outside the sub during WW II. Subsequent years of meaningless navy ground assignments and the animosity of a former sailor, leave White (now a captain) feeling guilty and empty. His life spirals downward and his wife is about to leave him. Suddenly, he is forced into a dangerous rescue situation at the start of the Koren War.... reassigned to the same submarine where all of his problems began.

The Lionians, a tribe of lion worshippers, make a desperate attempt to find a cure for the mysterious disease plaguing their village. Their Chief decides to kidnap Jane and Lola, a half-breed nurse, in order to help repopulate his civilization. Tarzan must rescue them while fending off blowgun attacks from people called the Waddies who are disguised as bushes.