August 1944: proceeding with the invasion of France, Patton's Third Army has advanced so far toward Paris that it cannot be supplied. To keep up the momentum, Allied HQ establishes an elite military truck route.

Newly married Kay Dunstan announces that she and her husband are having a baby, leaving her father to come to grips with the fact that he will soon be a granddad.

A rich, young beauty, Louise Durant, follows the man she loves and hopes to marry to Zurich where he studies violin at the conservatory. A piano student at the conservatory falls madly in love with Louise. The violinist loves his music first and Louise second. The pianist loves Louise first and his music second. Louise must ultimately choose which man she wants.

Proud father Stanley Banks remembers the day his daughter, Kay, got married. Starting when she announces her engagement through to the wedding itself, we learn of all the surprises and disasters along the way.