Moon-jung is a caregiver who has a son in middle school. After getting divorced, she can't bear to bring him to her house, a plastic greenhouse she has converted into a home. She strives to raise the necessary funds to move into a real home for her and her son.

An over-educated, disenchanted woman, Ja Young, loses her ambition after many grueling years of studying for the public official exam. One lonely evening, a beautiful, fit runner, Hyun Joo,...