A husband-and-wife detective team takes on the search for a missing inventor and almost get killed for their efforts.
Recently returned home from vacation, private detective Nick Charles and his socialite wife, Nora, are back on the case when Nora's cousin, Selma, reports her husband Robert missing. As the duo search for the disreputable Robert, Selma's friend David Graham, who secretly pines for her, aids the investigation. When the three begin to unravel Robert's secret life, the missing persons case turns into one of murder.
Not even the joys of parenthood can stop married sleuths Nick and Nora Charles from investigating a murder on a Long Island estate.
High society sleuths Nick and Nora Charles run into a variety of shady characters while investigating a race-track murder.
On a trip to visit his parents, detective Nick Charles gets mixed up in a murder investigation.
An imposter and thief called Dumpling escapes prison and arrives to a respectable institute of doctor Strukl in Balm Sanatorium. The doctor is a specialist for reduction and gaining of weight, and wanted by many celebrities, especially because it is known that he has specialized in Switzerland. Dumpling, discovering that he is physically similar to doctor, and seeing his big chance in it, disables the doctor and takes his place at the sanatorium.