Truly one of the best C-Drama I have ever watched. IMHO, it also surpassed some K-Dramas. The story and the plot were concised and the time loop plots were not boring because they gave us more and new informations. Each episode also explored the different story about each passangers. It gave me suspense and made me curious that I kept wanting more. The drama managed to surprise me with the twists but it also gave a clear picture of what could really happen in real life (how onlookers are afraid to report, or how some cases were not investigated completely). All the actors did their best with their roles, but the victim's parents were the best! Bai Jing Ting and Zhao Jinmai killed in this roles! Definitely an underrated gem and worth to watch!