A Home as Warm as A Flame

Fwoom! The grass, the buildings ,the whole town have been burned by an unknown group! what could have possibly happened for this outcome!

Once upon a time there were two twin sisters who have been living in this town since birth, and until now there were no problems, so why did a group of arsonists suddenly burn the town? was it for fun? or another motive? Well it all began one day, when an accident had occurred.