One Chance:Revenge of the past

Is it right to take revenge for just a simple thing ? Is it right to take revenge on someone that hasn't done anything to you ? The Black mailer of Aerienne Rodriguez, Black Witch . Bina black mail niya si Aerienne ,for what reason ? Is it becouse of "No debt remains unpaid "? Magiging fairytale ba Ng buhay nila Aerienne o magiging magulo dahil kay Black Witch?