A train known as the Iron Mule is loaded with passengers, and starts off on its trip. Along the way, the train faces numerous obstacles and delays. The engineer is prepared for most of them, but the real challenges come when the train is ambushed by Indians.

Struggling stockbroker Jimmie Shannon learns that, if he gets married by 7 p.m. on his 27th birthday -- which is today -- he'll inherit $7 million from an eccentric relative.

A film projectionist longs to be a detective, and puts his meagre skills to work when he is framed by a rival for stealing his girlfriend's father's pocketwatch.