Movie's information

The Synopsis:

Genius scientist Sejeong lives with her cyborg husband Sungmin. She erased Sungmin’s memories and inputted new customized memories and information of her choosing, so she is able to enjoy a blissful marriage. Then someone Sejeong and Sungmin knew before he became a cyborg starts coming to their home. This person tries to correct Sungmin’s distorted memories while Sejeong tries to stop her. Sungmin, in the meantime, starts lying like a human being. What happened before Sungmin was turned into a cyborg?