Pretty and successful, with a rich, handsome boyfriend, Katie has created her own perfect world But now it's crunch time In one week her sister Bells is coming to stay and Katie's boyfriend Sam doesn't even know she has a sister It's always been too difficult to bring the topic up Bells is different, she just doesn't fit in Bells' arrival turns Katie's world upside down Soon Katie's relationship with Sam is under severe strain - and problems escalate when she receives disturbing news about her mother But, with help from Bells, Katie finally learns about real love