Eva Gabor reports a theft to Hildy, and gives her a rhyming note, signed ""The Butterfly,"" which communicates a threat to rob the Gabor family's ruby that is on exhibit at the International Jewelry Show. Hildy recognizes the suspect as the man who eluded her husband, the former Sheriff, five years earlier. Although she foils the theft and ""evens the score"" the thief cleverly escapes.

Hildy plans to net The Butterfly, a notorious jewel thief who steals a priceless ruby owned by Eva Gabor (HERSELF).