They Wait [2007, horror, thriller, detective, DVD9]

Jason Tsai, his wife Sarah and their six year-old son Sam live in Shanghai and they need to travel to the Pacific Northwest in North America in the Hungry Ghost Month for the funeral of Jason's Uncle Raymond. Raymond and Aunt Mei owned a family factory in the basement of their house, and Jason was raised by them. Further, Raymond founded a Benevolent Society fifty years ago and he was also known as The Bone Collector since he exhumed the bones of the immigrants and shipped them back to China. Sam begins to see spirits everywhere and a pharmacist feels that the boy and Sarah have sensitive souls and he advises that the Hungry Ghost Month is a dangerous period for people that can see spirits. He explains that angry ghosts can become demons and the realms of the living and the dead intercept and the dead can walk in the world of the living. Sarah and Aunt Mei do not like each other but they stay in her house. Sooner Sam mysteriously falls into a coma and the doctors can not find an answer for his problem. Sarah sees the ghost of a woman and finds a grave box in the former factory. She returns to see the pharmacist and he tells that the box belonged to a woman named Shen-Lu. Further, he tells that Sarah needs to go to the world of the dead to retrieve the soul of her beloved son.