An eager young fireman played by Robert Lowery suspects arson in a store fire and he's got good reason to think so. His suspicions are confirmed and he gets a promotion to the arson investigation squad. The job gets doubly dangerous when a previous arson investigator is killed and his briefcase containing all his investigation notes go missing.
The trail leads to insurance investigator Douglas Fowley who has a sweet little kickback racket going about his insured clients kicking back money from their settlements to Fowley.
Fowley even supplies his own torch in the person of roly poly character actor Edward Brophy. Usually Brophy played good natured mugs in films and he starts out that way here. But he's far more dangerous than Lowery originally thinks.
In its short running time Arson, Inc. does deliver the entertainment goods. There's not a frame of film wasted and it's nicely edited, unusual for film from a poverty row studio like Lippert Pictures. Look also for a nice performance from Maud Eburne as the wise cracking grandma for Lowery's girlfriend Anne Gwynne.
But it's Brophy who really steals the show. It's a side of him rarely seen on screen.