The various members of the middle-class Hilton family have a series of romantic misadventures during one eventful spring day.

Linda works at an advertising agency, but, unlike the other women in the secretarial pool, she hopes to succeed in the business rather than just find a husband. She rises through the ranks, becoming a copywriter, and attracts the attention of Jimmy, an amorous coworker who wants to marry her. But Jimmy is jealous of Linda's career and of Harry, a radio executive who works with Linda, and their marriage gets off to a very rough start.

Comedy-mystery finds Detectives Kelly and Dempsey trapped in a deserted lighthouse with a group of strangers who are being terrorized by a killer octopus AND a mysterious crime figure named after the title sea creature.