What would you do if you were ordered to enter a fake marriage… with your crush? That's exactly what happened to Do-Dam, an agent working for the NSO, the most secretive government organization. Do-Dam's mission? To expose an industrial spy. But here's the twist: she has to go undercover as a newlywed with her boss and crush, Ju-Won Gi. Do-Dam is determined to accomplish her mission and win Ju-Won's favor along the way. Can she safely complete her mission? Or will her feelings jeopardize everything? (Source: WEBTOONS, edited)