only intelligent viewers can understand and appreciate the intricacies of the Sisyphus Kdrama-- a web of myth & imagination which became reality ... past events with scientific findings which became reality but unheard of in the present and future thoughts of an engineer inventor (time machine) ... all woven into flashbacks with characters from the future giving warnings of events to characters in the present.
I love the drama which seemed uninteresting in the first episode but gradually developed into viewers wanting to be a part of the whole sci fi tragically sad filial events and mellow
dramatic romantic twists.