Two detectives from different eras, warm-hearted Hidaka and cool Fuwa, team up in the "Okra" department to solve long-unsolved cold cases, utilizing their generational gap to unravel the truth behind each mystery using the slightest clues.

An unhappy young woman from an abusive family is married off to a fearsome and chilly army commander. But the two learn more about each other, love may have a chance.