An amateur sleuth suspects foul play when a fellow passenger on a seaplane suddenly dies. The third and final film with Edna May Oliver and James Gleason as the astute schoolteacher Hildegarde Withers and the New York Police Inspector Oscar Piper busy solving crimes.

Lydia MacMillan, a wealthy woman who has never married, invites several men her own age to her home to reminisce about the times when they were young and courted her. In memory, each romance seemed splendid and destined for happiness, but in each case, Lydia realizes, the truth was less romantic, and ill-starred.

Two soldiers go absent without leave in Paris during World War I.