Biplane pilots and robbers battle over a family diamond mine in South Africa.
It's 1942. Rubber is a valuable commodity during WW2. Eddie Delaney is a second lieutenant in the army, but also a private detective. Eddy swings into action, when his father, police-sergeant Timothy J. Delaney, is gunned down by rubber racketeers.
An ex-con is murdered in Yellowstone National Park while a bank robber's son is searching for the loot his father hid there 20 years before.
Bill Hickok, assisted by Calamity Jane, is after a foreign agent and his guerrilla band who are trying to take over some western territory just as the Civil War is coming to a close.
