The Host (2006)

Hee-bong (Byun Hee-bong) is the owner of a small food stand in the Han River Citizen's Park, selling squid, candy and beer to people who have come out to enjoy the sun. Gang-du (Song Kang-ho) is one of his three children, a man who seems a bit slow mentally and whose one motivating strength is a devotion to his schoolage daughter Hyun-seo (Ko Ah-sung). Rounding out the family is Nam-joo (Bae Doona), an amateur competitive archer and her brother Nam-il (Park Hae-il), a former student radical who at present is drunk and unemployed. There are no mothers in the family -- Hee-bong's wife having passed on and Gang-du's having run away. It's a dysfunctional group, held together only by the crisis that faces them, and yet the family dynamics will feel familiar to many viewers.

It is when the creature snatches the young Hyun-seo that the family becomes aligned against this unknown biological threat.