Why Can't we Stay the Same

They consider theirselves as their own sisters, they have been together through their ups and downs, but before they met and became best friends something dreadful happened to their past. They also met some people that are connected to the past and reveals more secrets about the tragedy that made their life more complicated. What if the past keeps chasing them? And a lot of problems came into their life, are they going to fight fate for the sake of their friendship or are they going to give up and lose everything within a blink of an eye? Are they going to choose Love over Friends? Or Friends over Love?