The series follows the mystery-solving adventures of the Teen Angels—Brenda, Dee Dee and Taffy—and their friend Captain Caveman (or Cavey for short), a prehistoric caveman and superhero whom the girls discovered and thawed from a block of ice. The concept and general plot for the show was seen as a parody of "Charlie's Angels".

In flashback from a ‘Rebecca’-style beginning: Ellen Foster, visiting her aunt on the California coast, meets neighbor Jeff Cohalan and his ultramodern clifftop house. Ellen is strongly attracted to Jeff, who’s being plagued by unexplainable accidents, major and minor. Bad luck, persecution…or paranoia? Warned that Jeff could be dangerous, Ellen fears that he’s in danger, as the menacing atmosphere darkens.