A detective investigating a man's death in the mountains meets the dead man's mysterious wife in the course of his dogged sleuthing.

Nora and Hae Sung, two deeply connected childhood friends, are wrest apart after Nora's family emigrates from South Korea. 20 years later, they are reunited for one fateful week as they confront notions of love and destiny.

Ace NIS agent Jung Hae-seong is demoted after a mission failure. He goes undercover at a high school to locate King Gojong's missing gold, meeting his teacher Oh Soo-ah, who sees him as her lost first love, stirring old heartbreak.

In this competition of intelligence, contestants face off in games of wit and strategy to be crowned winner and go home with the ultimate prize.

A married couple who received a divorce settlement lose their memories in an accident. With amnesia, they fall in love again, so their families try to restore their memories to finalize the divorce.