
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...
Dong Seok takes Gong Joo to a bus terminal and sends her off to Busan by herself. When Yoo Min and Hae Chul find this out, they chase the bus Gong Joo got on and saves her. Meanwhile, Ho Bang and Hae Sung catch Dong Seok at the airport, but he manages to run away.
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.