"You are the only one who can save him." Princess Isabelle of the small Mediterranean kingdom of San Piedro throws aside her pride to beg her former lover and now millionaire entrepreneur Paolo Caretti to save her nephew, the new king. It has been ten years since the world's most famous and beautiful princess was forced to separate from her first love due to their class differences. Even after all this time, her heart still flutters for the gorgeous Italian man, but she has to marry a nobleman to save her country. Paolo, whose heart was broken by Isabelle's harsh words in the past, still cannot forget the princess and agrees to help her under one condition—she has to become his lover!