Luke and his mother Avril eke out their existence tending to their run-down, isolated farm in a remote part of England. They both miss Luke's sister June so much and would give anything in the world to have her back with them, alive and well again. But life can be harsh and these days we can rarely hope for miracles. Until one day the miracle happens. Out of the sky one night drops a brand new, full-grown, large-as-life sister - the answer to all their prayers. Or is she? For who exactly is Sadie, and where did she come from? Is she all she appears to be? And if so, why are so many mysterious people determined to find her? An exciting, funny, tender tale of a family whose lives are changed forever by the strangest of strangers.