The stooges are small time actors traveling by train to an engagement. Along with their pet monkey, they manage to spoil the trip for quite a few of the other passengers including the conductor and a big movie star. Eventually their antics get out of hand and they are literally tossed off the train.
Taxi driver Andy Clyde gets mixed up in drunken passenger Arthur Housman's scheme and has to dress up as a Indian to entertain Housman's guests. Then the real Indian comes and he gets confusion about what kind of Indian he's supposed to be.
There are plenty of suspects when an unscrupulous, blackmailing businessman turns up dead, especially the Police Commissioner's current paramour, who actually confessed to the killing before it was committed.