Father O'Malley is sent to St. Mary's, a run-down parochial school on the verge of condemnation. He and Sister Benedict work together in an attempt to save the school, though their differing methods often lead to good-natured disagreements.

Years after she was presumed dead in a shipwreck, Ellen Arden returns home to the surprise of her husband recently remarrying. But he too gets a shock when he learns that Ellen spent her time alone on an island with another man.

Unfounded suspicions lead a married couple to begin divorce proceedings, whereupon they start undermining each other's attempts to find new romance.