Nam Shin-woo is the third son of Oh Ro-ra and Nam Jung-woo. He had a girlfriend named Go Hae-ri whom he loved so dearly. Shin-woo and Hae-ri are together and had the most perfect relationship until Hae-ri dies because of a deadly disease that led her into a very sick stage. To take away his pain, Shin-woo attempts to bring Hae-ri back to life by creating an AI robot modelled after his desceased girlfriend, naming her SUJ