Nisa a personal tour guide, and Pongsathorn a talented young man, are deeply in love. Nisa who is optimistic about love, hopes that her love will last forever. However, love isn’t enough for the ambitious Pongsathorn...he betrays Nisa’s love for success and a new found relationship. The betrayal has set Nisa on a path of vengeance - she undergoes a full make over and transformation, and makes a huge comeback as Si-Tang to get Pongsathorn’s attention. Will Nisa really destroy Pongsathorn like he ruined her life? Catch the ferocious revenge of a woman scorned in SHADOW OF THE AFFAIR.