Green Plum Blossoms in the Republic of China

Originally they were childhood sweethearts, but Nan Xiao's temperament changed drastically after he returned from abroad for six years, and he married Gu Yan as a last resort. The sweet memories of his childhood have now become a scar in Gu Yan's heart, and he can only lick the wound alone in the dead of night. When the truth is revealed, where should they go?