Sister! Sister?

Claire spent many years in search of the younger sister Alice - after a break with her mother, her father took her deception to another country. And now she comes the long -awaited letter: Alice is going to return home to England. However, very soon the happiness of Klaire is replaced by an unaccountable anxiety. Why does Alice behave so strange? Copies the clothes and behavior of the older sister, openly flirts with her husband... Or maybe Alice tries to take her place in the family?.. But no one except Claire notices Alice's strange behavior. Then she decides to conduct her own investigation and find out the truth: who is Alice actually - her own sister... or an impostor?