This work is a human mystery entertainment story that follows two detectives from different eras: Hidaka Senji, a warm-hearted “Showa-era detective,” and Toshiki Fuwa, a cool-headed “Reiwa-era detective.” Together, they tackle long-standing, unresolved cold cases that have been shelved for years. In a department known as “Okra” where misfits assemble, a pair of detectives with a generational gap work together, using the slightest clues to get closer to the truth behind each case.