Indicia title is "Zane Grey's KING of the ROYAL MOUNTED, No. 283." Code number is K.O.S. #283-507. Copyright 1942 by King Features Syndicate, Inc. Copyright 1950 by Stephen Slesinger.
King flies to Plain City, where "Nitro" has sent "invitations" to the police and others to attend the robbery of the First National Bank. The robber shows up right on time and threatens to detonate a container of nitroglycerin if he isn't given $50,000. He takes King as hostage to gain passage to the mountains, where he leaves King without his gun or boots. After he makes his way back to town, King is again confronted by Nitro, who plans to repeat the robbery in 24 hours.