Charlie Chan in the Secret Service

Charlie Chan, a dedicated U.S. government agent based in Washington D.C., is called upon to probe the mysterious murder of a brilliant torpedo inventor. Teaming up with his enthusiastic yet somewhat clueless son Tommy and resourceful daughter Iris, Chan delves into a web of intrigue surrounding the crime. As they encounter various suspects and clues, the trio must navigate danger and deception to uncover the truth behind the inventor's untimely death and the secrets of his groundbreaking creation.