During her investigation of Hanmin Investment & Securities, Hong Geum Bo encounters an informant whose revelation throws her into unexpected difficulty, compelling her to adopt a clandestine persona.

Presenting herself as a young employee of twenty, Geum Bo sought to draw near to Ko Bok Hui, hoping to glean information. Her carefully constructed facade faltered, however, the moment Sin Jeong U entered the office, a sudden flutter starti…

Keum-bo persists in her investigation, pursuing leads while remaining hidden from Jung-woo. This clandestine work, however, creates friction at home, where she finds herself increasingly at odds with Bok-hee.

Though she averted a crisis at the office, Keum-bo now finds herself on the precipice of dismissal. As she fights to retain her job, she begins a search for someone or something called "yehppee."

The arrival of a newcomer disrupts Keum-bo's peace. News of a spy prompts Chairman Kang to initiate a thorough investigation within the household, compelling Keum-bo to prioritize locating "yehppee."

Driven by a desire to uncover the truth surrounding the slush fund, Keum-bo throws herself into winning the company's top employee competition. The pressure mounts, and a tense confrontation ensues when Jung-woo corners her in a stalled ele…