Someday or One Day (2019) is a Mystery, Sci-Fi & Fantasy, Drama series that follows yu-Hsuan lost her boyfriend Chuan-Sheng in plane accident. She then discovered Chuan-Sheng and a girl look alike Yu-Hsuan both appeared in a photo taken in 1998. Accidentally, she had backed to 1998 and met a boy looked alike Chuan-Sheng. Someday or One Day is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 8.9 out of 10 from 53 votes. Fans of mystery series may also want to explore similar titles below.