"In 2011, Cai took his two sons to his workplace, a factory in Fuming, where he worked as a stone caster, and found a school for them. Ever since, they have been living in a hut owned by the factory, with only one bed. We began filming their life on February 2nd 2014. On the morning of the 6th, we received threats from the boss and had to stop filming."(IMDb)