The Person You Love Was My Sister

Tae Ree invites four people to her cottage and plans to murder them by setting the place on fire. Among the four, two of them had tortured her regarding the death of Lieutenant Cha Jong Chul, Sun Hee and Do Hee's late father. The other two are Sun Hee and Do Hee who have also been causing trouble for Tae Ree. However, little does she knows, Kang Min plans to kill his own wife and make it seems like the twins' doing.