Kate was the first to find her sister's lifeless body when she arrived home. She'd been on the phone with Amy

when she heard the breaking of glass and the fatal scream.

The killer, however, was never found.

Now, two years later, Kate has begun hearing Amy's screams from those tinal moments again.

Is she losing her mind?

Or is she the next to die?

Investigator Eli Garrison is determined to find out...

Or die trying.