Robin and Spoiler get on the trail of Cluemaster, Czonk and Electrocutioner, as do the cops. Robin soon figures out that a clue sent by Czonk to the police for no apparent reason is indicating the theft of worn-out currency, so he interrupts the robbery. However, he and Cluemaster become trapped in the back of the armored van containing the loot, and the van itself is soon buried in concrete, where no one will think to look for it.