When strange seeds drift to earth from space, mysterious pods begin to grow and invade San Francisco, replicating the city's residents one body at a time.
An American doctor and his wife, a former singing star, witness a murder while vacationing in Morocco, and are drawn into a twisting plot of international intrigue when their young son is kidnapped.
Alcoholic playboy Kyle Hadley marries the woman secretly loved by his poor but hard-working best friend, who in turn is pursued by Kyle's nymphomaniac sister.