Home Sweet Home (2005 film)

Home Sweet Home is a 2005 Hong Kong horror film directed by Cheang Pousoi, starring Shu Qi, Karena Lam and Alex Fong.

One day, May takes Chi Lo to a neighbors birthday party for fun. During this time, Chi Lo is kidnapped by the hideous being, revealed to be an insane woman who mistakes the boy as her own son. After informing the police, May and Ray begin searching the complex. In the parking garage, Ray is stabbed by the deformed woman with a makeshift knife, critically wounding him and is later rushed to the hospital.With her neighbors refusing to help, May is forced to continue the search alone. While searching through the complexs air ducts and nearly being attaked by the deformed woman, she falls through a vent cover leading to the outside of the complex and is knocked out upon hitting the ground. A second attempt involves the help of a dog which quickly picks up the womans scent, tracking her to a rooftop. The dog scares ChiLo and is killed by the deformed woman but not before biting off one of her fingers. When May arrives, she ends up collecting the severed finger from the dogs mouth. ........

Source: Wikipedia