Kim Minjeong, better known as Winter, a girl of just 21 years old, is a therapist who works in a psychiatric hospital where the most dangerous murderers, psychopaths or schizophrenics in the country or internationally are housed

Yoo Jimin (you), better known as Karina, a 29-year-old girl, is a known psychopath, she had been locked up there for her different crimes, They were afraid of her