Asian Drama

The story of a ruthless female assassin named Sook Hee, who from an early age has been taught to kill in Yanbian, China. She becomes a sleeper agent for South Korea's intelligence agency, who promises her freedom after 10 years of service. She dreams of having a different type of life, however, two men from her past make an unexpected appearance in her life, bringing out dark secrets from her past.

The tale of former teacher and student, Oh Eun Soo and Kim Bit Na, who meet again years later after they married brothers, Yoon Soo Ho and Yoon Soo Hyun. They even become stepsisters after remarriage of their parents.