The life of Moonjung, the protagonist of 'Greenhouse', is not happy. She suffers from psychological disorders and her young son is locked up in a youth detention center. As she has no home, she lives in a greenhouse. She sometimes sees a man, but she is not sure if she really loves him. However, due to her kindness and sincerity, she was the caregiver of an elderly couple, living under harsh conditions until tragedy occurred. After the incident, her life fell into a whirlwind and her narrative quickly fell into chaos. In each major part, the genre conventions are cleverly applied, and Moonjung's fate, trapped in a tragic trap, unfolds in the form of a clever and painful thriller.