Kang Hee-jin (played by Nam Sang-mi), a female college student studying in Seoul, works hard every day and is exhausted. This day, she received a call from her mother and learned that her sister Shao Zhen (played by Shen Enjing) was missing and her whereabouts were unknown. She hurried back to her hometown, but her mother was stubborn and thought that Shao Zhen could return home only by praying devoutly. ...