 Instead of following Albert's suggestion of returning the next morning, the thief locks the office door, forcing everyone to stay in the office overnight.Throughout the night, the Trotters try to keep themselves from boredom, such as Albert doing exercise.The thief brags to the Trotters that the police have nicknamed him "The Shadow" because he is a fast and quiet mover in a manner very similar to that of The Scarlet Pimpernel.