Famous detective Charlie Chan (Sir Peter Ustinov) is called out of retirement to help a San Francisco Detective (Brian Keith) solve a mysterious series of murders. With his bumbling grandson Lee Chan, Jr. (Richard Hatch) as his sidekick, Chan also encounters an old nemesis known as the "Dragon Queen" (Angie Dickinson), who is the prime suspect.
Detective Charlie Chan helps SFPD solve the many bizarre murders. His clumsy grandson Lee, who's getting married, "helps" him. Is the Dragon Queen behind this?