After watching a detective movie, Fire and Nolik decide they should become detectives. And soon they have their first case when they discover that Professor Eugenius has lost his lucky screwdriver. The young detectives are determined to figure out who took it. First they accuse Digit of taking it because they suspect he wants to take over Professor Eugenius’ job. He denies it, but nevertheless they arrest him. Next they accuse Toola claiming she probably took it because a lucky object could bring her good luck. Suddenly Toola finds herself arrested as well. Simka arrives and refuses to take part in the detectives’ ridiculous behavior. She tells Toola and Digit to simply leave. Fire won’t give up, and when Nolik refuses to arrest Simka, Fire now suspects it was actually Nolik. This causes the group to accuse Fire as being the criminal. As the tensions between the Fixies rise, they hear Eugenius talking to Elisa on the phone. It seems the screwdriver wasn’t stolen at all; Elisa had simply put it back where it belonged in the warehouse. Fire apologizes for his behavior, but is soon excited to hear that Eugenius has misplaced his lucky soldering iron. Now he’s got a new case to solve!