Assistant Lucy accidentally sends a flirtatious message to CEO Arthur, causing a public embarrassment in the office. Rich heiress Catherine, who is infatuated with Arthur, repeatedly makes things difficult for Lucy. Arthur intervenes to help her out, and the two gradually develop feelings for each other and become a couple. Due to family pressure, Arthur is forced to obey his elders' arrangements and marry Catherine, leading to a painful breakup. Heartbroken, Lucy drowns her sorrows in alcohol, while Arthur, lovesick, feigns illness and refuses to eat, persuading his parents to relent. Finally, Arthur, using his illness as an excuse, invites Lucy out, presents her with a ring, apologizes, and proposes. The two are happily married.
