Inspired by true events, Er Ren is a story about relationships and their illusions. A lonely widower lives in his sparse apartment, still longing for his deceased wife. Living secretly in his house, however, there is a woman, who takes part to this life "together" with him, taking care of the home when he's not there. When the fragile reality of this life "together" threatens to become too real for either to take, both Man and Woman must react.