Where is she ?

In one day Ariana and Arena was moving with there family to a new town. But Ariana and Arena was missing her friend and ask their parent to go back but there said no . Ariana and her mom have a debated so Ariana took Arena with her and leaving, when Ariana was wake up after from sleep she don't see her sister any where. So she ran home to get her parents for help. Read so you can find out what happened to Arena.