Set in 1950s L.A. Clandestine follows Frederick Underhill of the Los Angeles Police Department as he pursues his dream to become the most celebrated detective of all time. The death of a lonely woman gives him his chance. As an ex-lover of the victim, Underhill soon gets on the case with L A's most feared interrogator Lieutenant Dudley Smith. But instead of finding his career on the way up, he finds his life about to take a fall. . .