Daku has rested well since he was rebuilt and is now enjoying a calm life at the professor's house. But soon news get around that trash cans are being knocked all over the neighborhood. Nobody would know that this simple event will turn out to be the start of a major crime spree, a story of betrayal and a crisis for Daku's replicability. What could cause all this?
This is a story about a standard guard robot in a museum, who got into an accident during a robbery. He was heavily damaged, but thanks to the nice doctor Gottlieb Vanille, he is back and even more powerful, being able to fly at high speeds and able to cut through metal. He also meets the two assistant robots of Vanille, Lyfty and Yasu, to one of which he falls in love with. The robbery in the museum turns out to be the start of a much bigger problem, to which Daku might be the only help.