It's a compelling drama about time-travel and its implications. I like the chemistry and sweetness between the characters Yoon Tae Yi (Kim Hee Seon) and Park Jin Gyeom (Joo Won), as well as other supporting characters such as Reporter Kim (Lee Da In), Alice's agent Yoo Min Hyuk (Kwak Si Yang), the buddy police of Lieutenant (Lee Jae Yoon), and Team Leader Goo (Kim Sang Ho).
It also explores them of mother's love and self-sacrifice. And, of course for a time-travel series, the concept of parallel universe. The series resolve itself in a way, that is poignant although doesn't always make perfect sense. However the concept of space that stores the memories and emotion is a soft and tender way to remind us living in a world of crisis and slower pace.
