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Ms Chan, a social worker who has just returned to work, receives her first case. She pays a visit to Jia, a single elderly who seems to have accidentally dialled the Care-on-Call Service. Jia has suspicious bruises on his face and Ms. Chan senses a possible family abuse situation. However, Jia’s attitude is unwelcoming and he sends her off right away. Since then, a series of peculiar events make Ms. Chan question her own sense of reality and sanity.
