Rexid van Hexen, prince of the Hexen Empire and feared defender of the border, wants to become emperor. But because his brain doesn't even come close to his brawn, he enlists the help of the "Viper," a notorious swindler and master of disguise. With her life on the line, the Viper must now pull off her greatest scam while posing as... Rexid's heiress? Will the unlikely duo succeed, or will they end up being deceived themselves?