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?

Jueun and Taehoon, who lost their 6-year-old daughter Heesoo in a car accident, I live day by day without being able to escape the sense of loss. Taehoon, who couldn't see Jooeun getting ruined, At the recommendation of my friend, Junbeom, who is a program developer, I restored my daughter Heesoo to VR. The family that seemed to be looking for happiness again. Due to Jueun's strong obsession with AI Heesoo, It's getting worse.

Bo Young moves into the mansion of the previously wealthy grandmother, Wang, as a caregiver with a dangerous intention. Mother Kim, the only blood relative of Wang who hired Bo Young, sets conditions such as 'Do not bring anyone, especially children,' and 'Do not go near the reservoir'. Ominous and bizarre signs continue in grandmother Wang's huge mansion located next to a reservoir called 'Gwimot', where people are dying, and Bo Young finds out that foreigners who have visited the place have suffered a mysterious death...

One day, you fell from the sky. I never knew loving somebody could bring so much happiness. I see the world differently because of you. I am a different person because you live in my heart.

Crown Prince Sado spirals down due to his own insanity and his father King Yeongjo's complex.