Ruth (Mary Carlisle) is working as a telephone switchboard operator, she doesn't know much about her past. But then she discovered she is the long lost daughter of a rich railway owner. This puts a big target on her back but an attempt to kidnap her is foiled by the slightly strange Scott (Charles Ruggles) who turns out to be a kind of a private detective.
Ruth and party head off on a train to meet her father, Scott also tags along. After a few escapades including a murder and an escaped gorilla, the private railway car they are all in is set free - packed with explosives - to kill everyone...
This is a fun film that proceeds at a fast pace (like a runaway railway car). The story is also very varied, the humour can be a bit goofy at times but it does not spoil anything. A highly enjoyable film.