
S01E01 The Return
Hae Sung and Jung Won are ordinary high school seniors who are getting themselves ready for life after graduation. One day, Hae Sung wakes up to find everything surrounding him different. He was dead for...
Min Joon gets his wrist injured and Jung Won offers to help him. Hae Sung goes over to Min Joon's place and offers to help instead of Jung Won. Meanwhile, Gong Joo disappears from her kindergarten and Hae Chan looks all over the city to find her.
Although born in the same year, two childhood friends end up being 13 years apart because they have aged surprisingly at different places (worlds) for some strange reason. Now Eom Hyeon Soo is a 31-year-old woman but Sung Hae Sung is still a 18-year-old boy. Cha Won Yooung is a chef also interested in Eom Hyeon Soo.