Yong-gu is a mentally challenged man with the capacity of a 6 year old, the actual age of his daughter. One day he is falsely accused of murder, imprisoning him & placing his daughter into childcare. When his cellmates in No.7 learn of his false imprisonment, they set out to reunite father & daughter, by sneaking her inside! With a heart-warming story & touching characters, it's not hard to see why Miracle in Cell 7 is the 3rd highest grossing Korean film of all time!