In Los Angeles, a geological surveyor maps out a proposed subway route—and then goes missing. His eight-year-old daughter, in her desperation, turns to the one person she thinks might help—she writes a letter to Sherlock Holmes.

Reggie and Nigel Heath are relatively close in age but worlds apart in personality. The older of the two brothers, Reggie is a successful attorney with charisma to spare, but Nigel has always struggled