Blackthorn Manor Haunting

A woman in black stares at the sea, her body transparent, eyes brimming with tears. Hoping to get a better look at the woman, psychic medium Addison Lockhart leans out over the manor's windowsill, gasping when she feels an intense pressure pressing down on her back--someone thrusting her forward. She grabs the side of the window to brace herself, but it's too late. She's already falling. Who is the strange, melancholy woman haunting Blackthorn Manor? And why is someone out to keep Addison from unlocking the manor's darkest secrets?