
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 realizes that his dad killed Hae Sung twelve years ago and he feels apologetic towards Jung Won. Tae Hoon wants to tell Hae Sung how he feels about Young In and get his approval. Jung Won starts working at an art gallery where she runs into a teacher who used to work at her high school.
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.