She was devastated by knowing things happened between the person she was going to marry and her own friend. So she ran away even though she knew very well that she won't be able to survive on her own in country A where they ruled. She took the decision of moving from there and live in some other country without being known by anyone else about her identity.
Breaking up after discovering your boyfriend is not only a cheater but a jerk, you find yourself not wanting to date for a long time. But after being dragged into a party you did not want to be part of, you find yourself meeting the same person over and over again. Wouldn’t you call that a lovely coincidence? Will it lead to something more than you were expecting ?