In the city of robots Machinarium, a gang called "Black Cap Brotherhood" is dominating. At first, it all started with the usual hooligan antics, beginning with a slingshot and ending with the theft of the gramophone. However, one of the gang members decided to attack the mayor, infecting his brain with parasites. The mayor manages to call the robot scavenger that will send the bandit to a dump. However, the scavenger by mistake sucks the cleaner Joseph (you play as him). And the bandit washes of...