Lawyer Stephen Blume, specialized in divorces, lives a paradoxical situation when, having his own marriage break up, is still in love with his ex-wife.
Gedorge Segal plays a divorce lawyer who is divorced himself after his wife (Susan Anspach) catches him cheating on her. She, in turn, moves on and falls into an easy-going relationship with an even more easy-going musician (Kris Kristofferson in one of his first film roles). But Blume chooses this moment to fall back in love with his ex-wife (Marsha Mason) and begins to woo her anew.

Beverly Hills couple Barbara and Dave Whiteman are very rich but not happy Dave is a hard working business man, his wife is only interested in yoga, aerobics and other meditation classes, and he sleeps with the house maid. Their teenage son is confused about his sexuality and their daughter is suffering from eating disorders. While they are celebrating thanksgiving having plenty of food, street tramp Jerry is hungry, homeless, sleeping rough and has lost his dog. Jerry decides to end his life by drowning himself in their swimming pool. Dave rescues him and invites him to stay for a while. How does this stranger change the life style of this family?

Couples Bob & Carol Sanders and Ted & Alice Henderson are best friends. After attending a weekend self-help self-discovery session, Bob and Carol feel newly enlightened, and want their friends, Ted and Alice, to feel the same way.