A competitive swimmer crosses paths with his childhood friend, a rising weight lifting star, and realizes that she has a secret crush on his cousin.

As a killing resembling a cold case resurfaces in a small town, the chase for the truth falls on two policemen who each harbor secrets of their own.

Set during the Joseon Dynasty, the story of the meeting between the young widow Jung Soon-deok and young widower Shim Jung-woo as well as the struggle the two go through together to marry off the four young maidens who represent Joseon.

Time manipulation comes with a steep price for a young woman, who becomes 78 years old overnight after using a mysterious watch.

After life's ups and downs, a loving couple separated by death reunites in heaven — only to discover he's in his thirties while she's in her eighties.