"When Jessamyn Teoh starts hearing a voice in her head, she chalks it up to stress. Closeted, broke and jobless, she's moving back to Malaysia with her parents--a country she last saw when she was a toddler. She soon learns the new voice isn't even hers, it's the ghost of her estranged grandmother. In life, Ah Ma was a spirit medium, avatar of a mysterious deity called the Black Water Sister. Now she's determined to settle a score against a business...