Sisyphus: The Myth is JTBC’s 10th anniversary K-drama inspired by the Greek drama of the same name. It jumps between two timelines—future that has been ravaged by war and is in dire need of resources, and the present where Kang Seo-hae (Park Shin-hye) has traveled to, in order to stop Han Tae-sul (Cho Seung-woo) from creating a time machine. This is in contrast to the present timeline where all is well and destruction has not yet taken root.
A young game developer Jung Se-joo based in Spain develops a groundbreaking AR game based on medieval battles in Alhambra and offers to sell the game to Yoo Jin-woo. Somehow, reality and AR gets blurred.