In pursuit of her lifelong dream of becoming a writer, Yumi takes the bold step of quitting her job to focus on preparing for a novel contest. From the Schedule Cell meticulously planning her writing schedule to the Writer Cell tirelessly seeking inspiration and the Cheapskate Cell tightening the purse strings, every cell works diligently to support Yumi in her aspirations. Yet, as worries about the future begin to mount, Anxiety Cell looms larger, casting a shadow over Yumi’s determination. Even the Love Cell, once sweet and hopeful, turns bitter and skeptical as her relationship with Babi hits rough patches. With conflicts among the cells intensifying, the Cell Village finds itself confronting a crisis unlike any it has faced before…
'Jeong-seok', a public official who started a big-gaining part-time VVIP care service that costs a whopping 2 million won a week, visits a mansion in a deserted mountainous village. 'I-ppal', a senior part-timer who has the greatest idea ever, is constantly talking about it as soon as he meets him, and in the meantime, a legendary girl named 'Se-na' appears in front of him. The B-class war of the crazy people begins!