After her father, a bank branch manager, is caught embezzling money, Grace decides to try to persuade the head of the bank, Duke Herrera, to drop the court case. However, upon arrival at Lion's Castle where the duke lives, his servant coldly turns her away. Desperate to speak to the duke, Grace sneaks into the garden, only to be attacked by a guard dog unleashed by a mysterious man! The man is, in fact, the duke. Seeing Grace pleading for mercy, the duke decides to offer her an unthinkable deal….