The Trouble Chaser.

Hector, who was reared by a maiden aunt, decides to leave his sheltered life and become a reporter. At the newspaper where he has works, Hector becomes friendly with a young female reporter, who uses the byline "Firefly" for a series of articles intended to expose a notorious café. At the same time, Hector's aunt, head of the local Purity League, gives a stirring speech to the membership about ridding their community of the café. The young woman enlists Hector's aid and together they gain enough evidence to close the café.