The Four Seasons follows the trials and tribulations of a group of middle-aged friends during a 12-month period. Alan Alda (who also directed) and Carol Burnett play a married couple who consider themselves paragons of sensitivity and sensibility. Alda and Burnett are the instigators of a series of vacations (from New England to the Virgin Islands), which they take in the company of two other couples: Jack Weston and Rita Moreno, and Len Cariou and Sandy Dennis. Everyone's interrelationships are put to the test when Cariou and Dennis divorce, and Cariou subsequently marries the much-younger Bess Armstrong. Not too surprisingly, the comings and goings of The Four Seasons are underscored by the music of Antonio Vivaldi.