A mystery mini-series with a story that revolves around a promise that refuses to go away over time and characters who are faced with tough decisions to keep that promise. To keep their values, characters are at a critical juncture to act upon their promises. Lovers, played by Han Chae Young and Lee Byung Hun in this romantic mystery by Lee Jae Kyu tells a love story that transcends more than 100 years (1907-2010).