Lena, a top-tier corporate investigator, stumbles into the power struggles of the Hawthorne family while searching for her missing twin sister, Erin; she is mistaken for the missing Mrs. Hawthorne by the cold and imposing CEO, Alexander, and taken to his estate. Seizing the opportunity, Lena feigns amnesia to go undercover as a stand-in and uncover the truth.
Using her keen insight, she exposes a plot by the stepmother, Victoria, to poison her, while Alexander secretly shields her from various corporate traps; amidst this high-stakes game of wits, the two gradually fall in love.
Lena eventually uncovers the full story: her sister and Alexander had entered into a marriage of convenience, feigning estrangement to counter the stepmother who was draining the company's assets, only for Erin to be imprisoned after obtaining evidence of money laundering. Laying their cards on the table and joining forces as a power couple, they present irrefutable evidence during a live-streamed shareholders' meeting to bring down Victoria and rescue Erin. In the end, Alexander proposes publicly, and the two stand side-by-side at the helm of their business empire.
