Hong Joshua is a handsome and wealthy young man. He works as a dentist at a relatively young age, Joshua even opened his own clinic. Joshua comes from a wealthy conglomerate family. Joshua also has a twin named Johan. After his mother died when he was in high school, his father lived abroad to take care of their family business. Since then, Joshua and Johan have lived alone in their luxurious house. His life is perfect. not until his big secret was revealed

When he was little, Joshua was diagnosed with psychopathic tendencies. Both parents did everything they could to stop this trait. Joshua never did anything dangerous. Since childhood, he grew up as a person with a calm and quite cool personality. Unlike his twin brother, Johan grew up as a cheerful and very friendly person.

The climax was when they were in university. Johan introduced his girlfriend to Joshua. Who would have thought, it turns out Joshua has liked and been stalking Johan's girlfriend for a long time. Joshua felt quite annoyed and disturbed, to the point where he did something completely out of control.

He kidnapped Johan's girlfriend and hid her in an apartment he bought in secret. The apartment is far from the city center. and here you are now, trapped by all of joshua's plans.