A thousand-year-old snake that has transformed itself into a human, Madame White Snake (Choe Eun-hui), falls in love with a young pharmacist named Heo-Seon. Although they encounter difficulties, they are wed, and their love for each other does not change. However, Beophaeseonsa (a Zen priest) and Gwaneumbosal (the Buddhist goddess of mercy) order Madame White Snake, who had transformed into human without being granted permission to do so, to return back to the world of the gods before July 7. Grieving, she prepares to say goodbye to her beloved husband. But before she can return to the world of the gods in time, she falls into a trap set by Dae-yun (Choe Sam), who is attracted to her. Because of the trap, she is not able to keep the promised deadline, and ends up risking her life to save her husband.
Choi Eun-hee
Madam White Snake
Shin Seong-il
Seon Heo
Han Eun-jin
Cheong-ah / Blue Snake
Choi Sam
Daeyoon Wang
Go Seon-ae
Old woman
Ok Gyeong-hui
Cheongah
Lee Yeong
Jeonok
Chan-sik Choe
Han Dae-yoon
Chu Bong
Merchant
Kim Ho-yeon
Park Byeong-gi
Lee Gi-hong
Jangsa Lee
Jeong Deuk-sun
Wife
Beak Song
Cheonsimdoin
Ji Bang-yeol
Beophaeseonsa
