Tenoroc's plan to bring ruin to Carnival City nearly goes awry when his latest super-villain recruit - the dangerous but dim-witted bell-ringer Igor - takes a shine to Roxie. But his evil scheme to ring out the Chaos Bell is soon back on track. Matt must call on all his courage, wits and Hatter Tech if he is to stop Igor sounding the death-knell for the Street Kids' City home.