Nombre original: 双探
Fecha de estreno: 9 de septiembre de 2021
Serie
Tiempo promedio: 40 minutos
Géneros: Crimen, Drama, Misterio
Sinopsis: A police detective investigating the kidnapping of elementary school students becomes involved in the intricate network of the underworld. Beijing policeman Li Hui Yan has gone alone to a small town in Dongbei due to a kidnapping case. By chance, he meets Zhou You, a mortician who is searching for the truth about his father's death. The two are pulled into grudges and entanglements that span three decades. In twelve days and nights, a secret about human nature is revealed.