Children with no identity, concealed by day, freed by night China, the 1980's.
Ming is an only child born to loving parents during the 'one child per family' regime.
She is lucky, but many children in her village are not.
Second-born children are outlawed.
They hide under their houses during the day and live their life only by night.
Ming cannot ignore the situation and chooses to sneak out time after time to play with her friends - the children of the night.
Until one ni.
