Cassandra, a beloved daughter, went missing. Her widowed mother and grieving siblings had assumed the worse. That she was dead. Yet the closure to Cassandra's life never came. She was everywhere for many years. In the reflection of a mirror. stalking behind the market stalls. 
Later the news arrived; she had died a brutal death at 16. Her existence swept away by the force of the ocean. 
But they still couldn't shake the feeling she was watching. 
As for Cassandra she woke many times

The Incarnation Sequence