After Dick Powell is involved in a car accident a man turns up at his office looking for a brown envelope having being unable to recover it from Powell's car. The man threatens Dick Powell with a gun and ends up dead on his floor. The man is well known to the cops. Solving the case of why the man was looking for the brown envelope leads to the recovery of $600,000 from a robbery.

At the end of the case Richard Diamond sings The Loveliest Night Of The Year.