Living alone is fine, but being alone is hard. Jina is the best employee at a credit card company call center. She avoids building close relationships, choosing instead to live and work alone. Jina maintains her solitary lifestyle well until her irritating neighbor, who would attempt to strike up conversations with her, is discovered dead a few days after his lonely death. From that moment, tons of relationships she decided to ignore suddenly start to bug her: her father hounding her over her mother’s inheritance, Sujin, a new recruit, who is bothersome but likeable, and nonchalant Seonghun, her new neighbor.