Plot synopsis: Wild and beautiful Nina Hartley discovers that being the wife of a professional tennis player doesn't always mean the balls will be in her court. She finds that the puzzle of her life has a few 'Missing Pieces' and is out to find them! First, she ventures to an intense, real-life swinger's party that must be seen to be believed. While there she witnesses Hustler centerfold Jill Ferari put a staircase to use for which it was never intended. Later, in her search to restore meaning to her life, she literally 'cruises' the bay of San Francisco with her gorgeous black friend and burly boat captain in a seaside whirlpool that leaves the vessel spinning in circles. Her journey through some of the more mystifying aspects of sex is gently guided by her friends Lili Marlene and Cindy Carver with the able help of Mike Horner. The final stop on her erotic odyssey catches half-batting husband, Bill Dee, totally unawares ... but definitely ready to try a brand-new racket!