The Thieves were once witness by Bill and Ben stealing things. Prior to this, Bill and Ben were warned to be on their guard, but the two didn't understand what it meant. One night, Ben heard some noises and saw a dark shadow. It turns out to be some thieves, they were shocked when they go between a door in the shed and see what they think is the same engine. After going back and forth between the twins for a while, the thieves make a run for it. The next day, Bill and Ben tell tell their drivers about it and think that the thieves were trying to play hide and seek with them. However, their crews were sceptical about the twins' claims.