Khun Hna Eain Tann Ka Ma Gyan Bone

Wealthy heir Koko falls in love with ordinary girl Katta and marries her, they are both orphans. During her pregnancy, Katta receives a family heirloom necklace from Koko's aunt. When she visits her grandmother Daw Gyan Bone before giving birth, she discovers her grandmother also owns an identical one. Despite their loving marriage, Katta never returns to Koko. What secret do the matching necklaces reveal about their past?