I will never forget you.

Felicia, the lady of the Marquis Anderson household, is an unfortunate woman. Born as a princess, she was betrothed to Lynes Anderson, a guard knight she loved. However, on their wedding day, he died. Since the wedding could not be cancelled, Lynes's twin brother Oliver took his place as the groom instead. This Oliver, standing in for his late brother Lynes as Felicia's groom, repeatedly commits infidelity and debauchery, neglecting Felicia. Felicia faces childbirth of twins, said to have been conceived on their wedding night, in her husband's absence. When Oliver declares that the newborn child will be named "Rosalia"—the name of his mistress—Felicia quietly opens her mouth and begins to speak the truth... A heavy tale of love and revenge.