A Tale of Two Sisters
Also known as: Sincerity is the Way of Heaven / Sweet Springs / Sincerity Moves Heaven / 지성이면 감천 / Jiseongimyeon Gamcheon
Genre: Family, romance
Episodes: 135
Broadcast network: KBS1
Broadcast period: 2013-Apr-29 to 2013-Nov-01
Chief Producer: Kim Hyung Il
Director: Kim Myung Wook
Screenwriter: Kim Hyun Hee

Cast:

• Park Se Young as Choi Se Young (27)
• Lee Hae In as Lee Ye Rin (27)
• Kim Na Hee (김나희) as child Ye Rin
• Yoo Gun as Han Jae Sung (30)
• Park Jae Jung as Ahn Jung Hyo (30)
• Jung Hye Sun as Shim Ae Gi (80)
• Lee Ki Young as Choi Jin Sa (60)
• Im Ji Eun as Choi Il Young (39)
• Kim Chae Yun as Choi Yi Young (35)
• Lee Do Yun as Noh Ji Hyun (9)
• Shim Hye Jin as Kim Joo Hee (54)
• Lee Jung Ho as Lee Min Gook (32)
• Oh Seung Eun as Oh Young Ah (30)
• Jun Moo Song as Han Ki Suk
• Kil Yong Woo as Han Yong Duk (57)
• Yang Geum Suk as Lee Mi Sook (54)
• Lee Se Chang as Lee Sung Soo (43)
• Ha Yun Joo as Han Ki Eun

Synopsis:

A child who was adopted meets the biological mother after many years. She struggles between her adopted family and the family by blood. She takes on a journey to find her identity and love while learning about the meaning of family. -KBS World