No Ae Jung is a film producer who's a single mother that's been on her own for 14 years. She's been unlucky since she was a child, and she suddenly encounters four men who shake up her life: a bad but tempting man, a pathetic but well-off man, a scary but sexy man, and a young but appealing man.
Go Ae Rin suddenly loses her husband. A mysterious man, Kim Bon, lives next door. Kim Bon is a legendary NIS agent. He helps Ae Rin uncover a conspiracy, which husband became involved with.
Would you like to go back in 18 years of time if you could? People have desires to turn back the time and fix the most regrettable moments in their lives. This couple with the same age is just like that. Getting married at a young age of 24 made them almost bite each other's heads off. They are given a chance to relieve those regrettable moments. Would they be able to choose a different life after all?
Choi Yeong Jin takes time off from work and is being replaced by Ko Yoon Jung. Ko Yoon Jung is just back to Korea as she used to be a FBI trainee in the USA.