In this third Adventure, Attorney Peter Sharp is retained to represent a man accused of murder by the planting of bombs in vehicles. The client is also suspected of being part of a conspiracy to assassinate the President of the United States in an upcoming Fourth of July parade. With the assistance of his legal ward Suzi, Peter cracks the case, identifies the real murderer, and at the same time solves the mystery of a dead body found in his friend Stuart's automobile trunk... all while falling for a lesbian lawyer, winning a Will contest, breaking up a stolen car ring 4,000 miles away, and battling with his ex-wife, who has been elected to the office of District Attorney. In the adventure's hectic finale, Suzi manages to get Bernie, her huge Saint Bernard into a courtroom, where she makes her first official court appearance, holds her first press conference, and becomes a local television hero.