After receiving a call from Hong Hui Ju's kidnapper, Baek Sa Eon attempts to learn more about him — only to find it's hard to escape his surveillance.

Sa-eon works quickly to track down the caller, forcing Hee-joo to stay extra vigilant. Despite her fears, she continues to play along with the ruse.

After Sa Eon experiences an attack, he grows wary of Hui Ju's relationship with her friend. Meanwhile, an ominous figure makes his presence known.