Published in Detective Comics #17, July, 1938, 8 pages.
It is against a band of hooded nightriders terrorizing the city of Meadeville that Bart Regan and Sally Norris are sent next. The direction is simple: "This terrorist organization must be stamped out and its leadership apprehended". Each take regular jobs to fit in and soon Regan is able to inveigle an invitation to join but in the first act of terror he takes part in, he is shot!