When little Molly arrived at Casey and Mike's home as an emergency placement it wasn't long before questions began to arise. Although she was only supposed to stay for the weekend, with her mother facing charges relating to drugs and neglect it became clear that Molly would need to stay in care a while longer. But Molly keeps talking about a little sister that she 'used to have'. In this story, Casey, determined to find out the truth and advocate for the children in her care, investigates Molly's story and attempts to work out the truth. But will Casey be able to work out what is true before it's too late?