After failing to settle in France, Yisoo returns to Korea to care for her sick father and discovers that his international marriage business is drowning in debt and entangled in illegal dealings. Desperate, she partners with Kavichi, a charming and mysterious Thai man, to run a risky sham marriage scheme. However, as people around her begin to disappear, including her close friend Rose, Yisoo realizes that both Kavichi and her father may be connected to the crimes. Now, she must uncover a devastating truth and save Rose.