On special assignment to capture a gang of gold robbers in Deadwood, South Dakota, Pinkerton detective John McBain goes undercover, posing as personal bodyguard to musical star Miss Nellie Armstrong. When the feisty redhead insists on joining forces with him to retrieve the gold stolen from her theatrical troupe, McBain finds his investigation and, indeed, his sanity turned upside down! Lively, humorous adventure-historical romance.