The mystery-solving team of the Teen Angels crack crimes with the aid of the recently defrosted Captain Caveman, the world’s first super-hero! Set free by the Teen Angels from his prehistoric block of glacier ice, comes the world's first superhero, Captain Caveman! Now the constant companion to the Teen Angels, Brenda, Dee Dee, and Taffy, in their hilarious, and sometimes scary mystery missions.

Edgar decides on a plan to get his freeloading slacker of a brother-in-law, who hasn't worked in four years, to get a job by faking a heart attack.