A well-to-do architect, Harvey Fairchild (Jack Lemmon) should be happy, but he's depressed and dreading his impending 60th birthday party. Meanwhile, his supportive wife, Gillian (Julie Andrews) endures a crisis of her own as she waits to hear back on tests for throat cancer, a condition that would threaten both her health and her singing career. As Harvey's birthday weekend progresses, the couple contends with these and other issues, and their problems threaten to eclipse the celebration.