Seong Gi-hun, a closeted virgin in his 40s, has never been in love. Never even had a boyfriend. But when a mysterious company delivers 001: Hwang In-ho, a humanoid robot built to be the perfect boyfriend, Gi-hun's quiet life turns into something he never dared dream of. What happens when artificial affection starts to feel real? A love story between a man who's never been loved and a machine programmed to love him completely.