This threadbare "Carry On" comedy is set in the 18th century and concerns a fellow with a dual identity: by day, he's the Reverend Flasher; after dusk, he moonlights as the treacherous highwayman Dick Turpin. (Both are played by Sidney James). Dogooders Captain Desmond Fancey (Kenneth Williams) and Sgt. Jock Strapp (Jack Douglas) search for this elusive scoundrel who is robbing travelers every evening. Adding fool to the fire is Mme. Desiree (Joan Sims) and her entourage of doxies.
by Hal Erickson synopsis