Through an exclusive matchmaking agency that caters to the ultrarich, a woman plots revenge against her ex-husband’s scheming mistress.

After being jobless for three years, Choi Joon Woong decides to take his own life and goes to a bridge to jump off of it. However, he finds someone else there who is also about to jump off the bridge and gets into a fight trying to save them. In the fight, the two of them accidentally fall off the bridge. A crisis management team run by grim reapers belatedly arrives at the scene, and Choi Joon Woong ends up falling into a three-year coma with his soul having escaped his body due to an error caused by the grim reapers. Now a soul who is half alive and half dead, he unexpectedly gets a job at the crisis management team at the most prominent company of grim reapers in the underworld. Gu Ryeon is the leader of the crisis management team . His job at the team involves taking special care of people with a high risk of suicide and helping them want to continue living.

It’s the year 2050 and time travel exists thanks to Alice, the mechanism through which the intriguing practice is made possible. But a rumor based on a prophecy beings to spread about time travel coming to an end. When You Min Hyuk and Yoon Tae Yi are sent to the year 1992 to find out about the prophecy, Tae Yi realizes she’s pregnant and decides to stay in the past by herself. She changes her name to Park Sun Young and eventually gives birth to a beautiful son named Park Jin Gyeom, whose mental health suffers due to radiation exposure. Fast forward to the year 2010, and Sun Young is murdered by someone. 10 years after her death, her son Jin Gyeom is on a mission to find who is responsible for his mother’s death. But while searching, he runs into Yoon Tae Yi, a physics professor who looks exactly like this mother. What will become of these individuals caught tragically between time and space?

When Jo Gang-Ja attended high school, she was notorious for fighting. She gave birth to her daughter A-Ran in her late teens and became more responsible. Her daughter A-Ran is now a high school student, but A-Ran is bullied at school. Jo Gang-Ja decides to go back to high school to protect her daughter. Jo Gang-Ja becomes a high school student again.