A romantic comedy spy drama starring Yoo In-na, Eric Mun, and Lim Ju-hwan. Three people who are full of secrets enter into marriage contracts while concealing their identities. Kang Ah-reum, a wedding dress designer who is originally a strong and beautiful ordinary woman, is accidentally involved in spy warfare because of her two mysterious husbands. Her ex-husband disguises himself as a travel writer, but he is actually a secret agent for Interpol, while her current husband, who is a diplomat, is actually a corporate spy. When an accident occurs and love and espionage intertwine, how will the secrets and identities of the three be revealed......