Eileen (Jane Fonda) is 22 and is smarting from her breakup with Russ. She comes to New York to visit her brother, Adam (Cliff Robertson), who is an airline pilot. Eileen confides to her brother that she thinks she may be the only 22 year old virgin left in the world. Adam assures her that sex is not what all men look for and insists he hasn't slept around. Of course, Adam is lying and is in hot pursuit of a tryst with his occasional girlfriend Mona. However, Adam's date with Mona has a series of job related interruptions. Meanwhile, Eileen decides to see if she can have some fun for herself in New York, and seems to find the perfect candidate in Mike (Rod Taylor), a man she meets on the bus. But things get complicated when Russ pops in with a proposal and a mistaken assumption.

Vanderbilt Avenue and East 43rd Street, Manhattan.

5th Avenue (btw East 65th and 66th Streets) Manhattan.

Rockefeller Center, 5th Avenue (btw West 49th and 50th Streets) Manhattan.

Rockefeller Center, 5th Avenue (btw West 49th and 50th Streets) Manhattan.

Restaurant (Ice Rink) Rockefeller Plaza, Manhattan.

Boating Lake, Central Park, Manhattan.

Central Park South and Grand Army Plaza, Manhattan.