At the year's end comes Marron Confectionery's inevitable employee evaluations. Third-year non-regular employees Jung Da-hae, Kang Eun-sang, and Kim Ji-song are no exception. As the results bring joy for some and disappointment for others, Eun-sang is oddly cheerful, even humming to herself. Meanwhile, with Da-hae's birthday approaching, her boyfriend Byeong-jun suddenly goes missing, plunging her into extreme anxiety.

After causing a scene at the company dinner, Da-hae is gripped with fear the next day. Meanwhile, Eun-sang is always scheming to make money, and Ji-song, who only thinks about spending it, goes their separate ways. Eun-sang devises a clever money-making plan at work, while Ji-song buys a ticket to China to meet her unfaithful boyfriend Wei Lin.