Katie, an andrologist, is given an ultimatum: marry within a month to save her family business. Nate, the powerful CEO of Blake Group, is forced to undergo a humiliating andrology exam to prove his "functionality" for an inheritance. Their awkward meeting in the exam room leads to a mutually beneficial contract marriage—a perfect solution for both their immediate problems. Unbeknownst to each other, their simple deal is built on double secrets: she is the hidden heiress to the Reed fortune, and he is the billionaire CEO disguised as an ordinary employee.